My pet peeves are the need for an AI Overhaul for NPC's, Building optimization, exploits, and too many servers. All but the last are being addressed (according to PR).
I think that last one should be looked at, since there are so many low to no pop servers. I would gladly start over (again) to find a server with actual people to play with rather than horde all of my supplies and work in ‘hopes’ that people will come play with me. I can understand that 'hope’ful frame of mind, but I doubt it’ll be common with the overwhelming amount of servers we have.
As to the topic: I agree with @Multigun, in that it’s better to have a vague timeline and to stray over that boundary rather than release something incomplete or buggy. Just imagine the MOAP coming out every month because people need their fix now. That would strangle off the population even faster, lol.