The connection and hit detection was definitely something I have an issue with, as you all heard when we were playing. I hate how one game you can tear through the team and go 30-4 and the next it's 4-15 because bullets just don't connect. If they sort that out and it's a balanced game, I might think about picking it up at some point. It has been an issue for a very long time, as much as I ranted about MW2 connection when I played it, I didn't have issues with shooting 10 bullets and then dying to two out of the blue.
I don't know if these so called dedicated servers are any good or not.
I might try the PC beta if they open it up, which I imagine they will or else they won't have enough players in there!