F10 is traditionaly used as menu key in RTS games since at least Starcraft, so I don't really think it should be changed.
As for selecting skills in dragon mode - I think having the "scroll up-down to select ability" function pinned to mouse wheel would be great. Why? Because the numeric keys could then be used to select pre-assigned unit groups. Assign a foctory to one of those keys and you can control production while flying with your dragon.
I'm pretty sure they're not allowing you to control production from Dragon form on purpose. Larian doesn't want the Dragon to be so useful that you can ignore the rest of the RTS mode, and I think that's fine.
