So do you really blame people for expecting to get a FINISHED game some time down the line?
I mean... In the last 10 years... When has there ever been a "Finished" AAA title?
Meanwhile, people had been (And still continue to) ranting and raving about how good the game was on release and how good it still is... Despite it being so very lacking outside of Act 1.
It'd be pretty disingenuous for people to be rating it GOTY and giving it award after award... On the presumption that it would eventually be finished and thus be deserving of such.
Ergo, it would seem that expecting the game to get finished is a problem for only a minority of people. With many others being satisfied with its unfinished state (Or at least, not bothered by it)