Regarding #1 on your list, no other OS I've used requires precise window resizing. For a vast majority of programs I use, I want them to be fullscreen or half the window. Ubuntu allows you to easily drag to a side to full/half-screen things.

#3. When I do ctrl-alt-left/right/up/down, it moves the workspace with me, so you retain focus on the window the whole time, plus it shows a brief display and arrow showing the window moving. It might still be weird to use hotkeys, but I definitely know where the window went at all times.