No. But we’d want to. Last year it nearly worked, but then changes to transform mask made it impossible again 
⚓ T11476 Animated Transform Mask
Ad 2. is only possible with a workaround using transform mask. Move frames to another layer, add transform mask, merge. If it loses frames, please do complain to me since it’s the main workaround and it must be working correctly.
It would be good to have transform tool and move tool work on all selected frames.
Ad 3. There is nothing like this yet