I'm using gnome-shell, but I'm also using avant-window-navigator as my bottom panel and I have also disabled dynamic workspaces in gnome-shell. If I could I would disable the top left hot corner in gnome-shell.
Being able to switch between workspaces with just my mouse is important to me. My main beef with gnome-shell is that when only using the mouse, switching workspaces is a pain in the ass especially with large displays.
I think gnome-shell is a great window manager, due to its metacity roots, but the usability of it needs some attention. I think the developers should have to use it without their hands on the keyboard and it will be obvious where the problems are.