I tend to prefer Google over other docs tools. Occasionally I hear that people feel it's terrible, but I don't understand why. Would you mind sharing a few things that bug you the most?
Finally, person preference, I don't like browser based apps. I get lost if I have more than two browser windows and five tabs open, why would I want yet another thing running in the browser then?
I'll sort of agree with a couple of your points though.
Better version control would be appreciated. I had a problem just this past week because I was extensively rewriting someone else's doc and I felt I needed to work on a copy to straightforwardly preserve the original. And this ended up causing confusion.
Searching for the right "shared with me" document out of the hundreds that get shared on a regular basis--many of them routine meeting agendas and that sort of thing--is really hard and I regularly have to try to figure out who the owner is and other characteristics that will let me track it down.