I'm sure someone already mentioned this, but I'd find it really helpful to be able too open up the inventories of both characters side by side.
It would also be nice to have hotkeys displayed on the skillbar, so that I can easily see which hotkey triggers which skill.
Concerning the camera angle, there was a nice presentation at the Game Developer Conference from a Diablo 3 developer about the way they modeled the landscape: the trees for example are only pseudo-3d, so they only look nice when looked at from a certain angle. If Larian is using a similar technique, a fully rotatable camera might simply not be possible.
Btw, am I blind or did my homestead button disappear? I used it once but now I'm not able to find it...