Good to see you mate! I'm sure you'll be back sometime in the future.
I think that what you want in an MMO is around the corner. Content gating and such is going the way of the Dodo, excluding people form content and thus driving them away from the game is going out of fashion fast! It lingers a bit in WoW, LOTRO (rad gear) and such, but that will also go away with time.
Levels are a bit harder, people like the feel of progression, hopefully they'll be able to come up with something better! Although current levelbased mmo's won't be able to change that mechanic I think.
Heck even servershards will go. The dynamic scaling (due to instancing) Guild Wars, Eve and now also Star Trek Online and others offer, is so much smarter. Could have saved WAR form dieing since PVP centric you need people to play against or there is no game. Even WOW has low population server problems. With instancing that would have been avoided. They are even trying to fix it there with dungeon cross-server instancing and PVP
We'll lose some of the hardcore stuff, but also a lot of the grind. I personally am looking forward to it. I've a hard time keeping up these days... and no its NOT my age! Why do you keep saying that?
Anyway, see you in another world sometime soon hopefully!
Gamers are young at heart and creative thinkers. Shall we play a game?