But perhaps your major conclusion is faulty? This is where discussion with others which don't share your point of view can expose their own and explain why they think what you suggest isn't practical/doesn't work/could be altered to/etc...
The discussions where everyone is already of the same major conclusion are the discussions that DO lead somewhere.
Because then we all can discuss how to improve the major conclusion with many minor conclusions.
Once you have a working concept then I completely agree with you, it is a waste of time to keep going back on that concept and trying to find something better, and it is better to actually work on polishing the concept you already have. But that's only valid if you actually something that works, which (seeing the number of people who disagree with you in this thread) is most likely not the case. You should thus open up and reconsider your own point of view - perhaps it is flawed. You are not always right (in fact, one is almost always wrong which is why forums such as gamedev exist). It's important to keep that in mind.
This is something it's impossible to be wrong in because a can work with or without a chat.
And if you've seen the other thread "players don't know what they want" How do I know that you who are disagreeing with me know what you want?
And I know tons of people who are of my opinion, It's strange that most people on this forum is mostly of other opinion.
But since this forum isn't only for gamers but a lot of IT guys and people who don't even like games.. They might just be stuying game designing and looking at what majority of players are generally saying in games like World of Warcraft and what big studios likeblizzard have done in their games...
But it's such a stupid way of making game designs.. It's like you're studying to become a cook when you don't even enjoy making food and prefer just throwing in a frozen pizza in the micro wave when you get home.
And It's also very stupid to listen to WoW players because there were such a gigantic amount of players introduced to MMORPG's with WoW.. They've never played MMORPG's before.. maybe they've played counter strike before... or age of empires... maybe they've never played a multiplayer game.. and even a HUUUGE part of the players never even played games before.