I think most games are finished, but most games like let's say Starcraft, do have a lot of balance patches. To make games enjoyable competitively, not just for the casual inf resource expert compstompers. But I can see it makes your job a little frustrating with games coming out as v1.0 then in two months suddenly v1.77.54 etc
I also see this with Crusader Kings, as there is a lot of things to tweak and change. Considering the devs listen to the more experienced CKIIers etc on what needs fixing, everytime Paradox ship a DLC with new things, they also ship a decent patch to everyone who doesn't own that specific DLC. Simulation games like CKII are supposed to have a great replay value, therefore there are a lot of changes. Understandably frustrating for you.
But you guys always deliver, and I cannot thank you enough!