Yeah, I'll miss it, as it's been a lot of fun, but it's not the end of the world. Looks like, for the final push (official close date is New Year's Eve), they'll pull out all the stops. 5x the XP, drop rate of uber-loot increased, and who knows what else. Also, they are adding a "huge nuke" in the main town, set to blow up on NYE and take the game with it. Hell, that might be worth logging in to see...
Now, to see how far I can get in it before the end of the year.