I've heard a lot of feedback around this point, so let me summarize all of the discussion that usually takes place, below, but if you want the TL;DR version: User interface modding is hard to do right, hard to support, and absolutely required of anyone who is seriously trying to unseat the primary MMO (World of Warcraft) in the market. I'll get to why, later. As Warhammer proved, it's not sufficient, but it is a requirement for long-term re-playability and community-building.
As a general note, I'll use "addon" and "mod" somewhat interchangeably, here. I see a "mod" as being anything that modifies the actual in-game experience (e.g. Auctioneer, HUDs, etc.) where "addons" are a much broader category that include simple user-interface changes and other tweaks as well as mods.
But my MMO of choice let's me change colors/fonts too!
Well, that's very nice, but changing layout and look-and-feel isn't what UI modding is about. Here are a few things that user interface modders have done in World of Warcraft:
- Added an auction house interface with long-term trend tracking, pricing assistance, scanning, tooltip enhancements, etc.
- I have a tiny addon installed that just alerts me every time I get agro on my healer or dpser characters, by playing a voice saying "agro!"
- One mod allows damage numbers to be filtered so that many damage numbers can be compressed down into single numbers to avoid spamming my screen.
- A mapping mod puts known locations of mining and herbalism resources on my map and then draws an efficient route between them so that I can run around grabbing stuff for my other professions.
- A chat mod transformed the standard chat windows into an IM-like interface that tracks who I'm having conversations with and warns them when I'm in combat and unable to reply.
- A raid-running mod lets raid leaders perform all kinds of basic administrative tasks more easily and improves on the basic "ready check" mechanic that the game provides.
- I have a mod installed that tracks how much gold I have on all of my characters and how much gold I've made/lost this session. Similarly, other mods track what goods I have on my characters and put notes in tooltips so that I know if an item is already in my bank or in the mail, etc.
Addons are cheating / WoW is easy because addons tell you what to do.
I have to agree to a point. There are things that Blizzard has been tolerant of from the addon community that I think they should have stamped out (in some cases they did, but took quite some time to do so). Then there's the question of DBM and other "how to raid" mods. In part, I have to agree that these mods are not a good thing, but most of my reasoning has nothing to do with "cheating." Quite the opposite; mods like DBM are so much an expected part of the raiding experience that Blizzard designs encounters so that they expect you to play with addons that tell you what's going to happen. I'd rather they focus on making these things visually distinct (e.g. giant pillars of lava are probably things you should not stand in). As it is, bosses now "emote" subtle queues that these mods pick up on and tell you "turn around to avoid being blinded," or the like.
IMHO, this is just bad raid design, but the fact that WoW has bad raid design has absolutely nothing to do with the value of mods. Just like WoW bans the use of mods that facilitate cross-faction chat, they could just as easily ban mods which act as "howtos" in raids. That's a matter for game designers to decide, and has nothing to do with allowing addons in the first place.
If the default UI is fine, you don't need addons.
This is said fairly often, but the fact of the matter is that no gaming company has ever produced a perfect (or perfectly customizable) UI. Addons will always improve the game because there will always be someone out there with a good idea that no one in the gaming company thought of. It's just a matter of numbers.
But addons allow viruses!
I'm a game developer, and I can spend my time on content or UI mods, why would I choose the latter?
This is probably the one question that I have serious respect for. Game developers are pushing the limits of productivity and trying to release a game on time. How can they spend hundreds of man-hours on developing a tool that very few of their players will ever interact with directly? The right answer is to ask how they can spend so much time on the internal content tools they develop? Sure, your players will never use them, but without them, you'll end up producing a game that's unplayable. The sad fact is that you have to budget for this up-front.
On the flip-side, game developers don't seem to push this as a major selling feature. Why is that? If you produce the bigger, badder UI addon framework and it's designed to build a community, why wouldn't you be pushing that to everyone who will listen?! Make it drive the buzz about your product in technical circles where a video game wouldn't normally be news. Get Slashdot talking about it. Have industry publications talking about how this is the new face of community development. Create a new kind of grassroots hype channel for your game!
Here are some interesting quotes on the matter:
- "People want loads of content right off the bat, and third-party add-ons are a given now," he said. "It’s a tough situation for new games." -MMO FFXIV needs 'FFVII's impact', Strategy Informer
- MMO fans may be wondering if there will be any interface customisation but at this point TRION are holding off on add-ons. However, they are open to the idea but it’s unlikely they will go as far as the customisation we saw in World of Warcraft. (which I read as "we don't want to be a real MMO") -RIFT Hands-on Preview, IncGamers
My personal feeling is that WoW is a great first try when it comes to allowing user-authored UI mods in an MMO, but it's horribly out-dated. I really don't understand why someone hasn't produced an MMO with an app store, for example. I mean, isn't that painfully obvious? The other problem is updates. There really should be a company-hosted development site through which addon authors can be tracked and their addons monitored so that the authors of the most popular addons can be notified of upcoming releases and betas, be involved in the process, and more importantly, the community can be made aware early on when a major addon hasn't been made to work with an upcoming change. WoW is always broken for a month after any big change because addon development is poorly coordinated, and that's just not something that should be expected.
After all, World of Warcraft is getting on in years, and it seems to me that the world of downloadable addons has taken over several industries. Isn't it about time that MMOs get some love in this respect, and actually start leading the way again?
If you're working for a gaming company and you find yourself wondering: should we have addons? Stop immediately and ask, instead, "what's the next big thing," in addons, and can we do that?