Preferences are perfectly fine Lydon, but I am just trying to point out that those same preferences will hold a person back servilely in the longrun. Things change, and I think that most of the people that complain about controllers are the one's that either have never gotten used to them, they find them to challenging for some reason, or are in a gaming rut.
Look at the example of FPS's you mentioned. For how long did people think they would never work on consoles? Then suddenly Halo worked, and then everything changed in a HUGE way. Then there are RTS's; they too used to be the sole domain of the PC, and that also changed. While I agree they can be better with a mouse + keyboard setup, I disagree that they cannot work well ,and this also goes for MMO's. An example of an MMO that uses controllers well - FFXI Online.
FFXI Online works amazingly on controller, actually it works better than on a keyboard + mouse! Now no one must tell me that game is easy, or dumbed down, because then you have not played it. You see the current gen of MMO's are designed for a mouse + keyboard. Obviously they will not seem feasible on console at the moment, but then I bring you back to FFXI Online which was, and works well on a controller. Now this is not including the idea that they may even move to a mouse + keyboard setups on console, which the current core MMO market will be likely to buy into if the games are decent.
And on the topic of communication. Voice is fine for any party based content, and the pad works fine when trading. Again people may prefer to use a keyboard to communicate in groups, however like the idea of not wanting to use a controller to game, only wanting to use a keyboard will hold a person back since voice is the preferred medium for group based play (just get into hardcore raiding, tactical FPS play, or whatever and you will see that).
As far as the fee goes, that is hypothetical argument. I can also use hypothetical reasoning and say that devs may reduce the price slightly, or Microsoft may make some kind of a concession for the MMO devs. Either way it is a weak barrier to overcome.
Look, FFXI Online WORKED on console very well since it was designed for it. Tons of people played it on console and they had no problems. FFXIV Online is coming to BOTH consoles (according to leaked info). The gaming industry and the shift towards console gaming would be fools if they did not see this potential market, and they are not. Many have commented that they are looking into it, Blizzard being the obvious one.