Document management is probably the thing that bothers me the most. Once a document is in Google Docs, it's basically impossible to find again, unless you link to it from somewhere else. Documents is some weird hybrid document/webpage/wiki thing. I hate that it doesn't have save button, completely breaks my workflow that it saves everything all the time. Sure I can make a copy, but how to I replace the original document afterward?
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 generally like Google Docs and find it does a good job of implementing the feature set that most people actually need without a lot of the cruft you find in something like Microsoft Office. And I'm minimally organized enough I can usually find my own documents without much trouble.
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.
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?