This sooo close to a total fixation. But if you want this to be hands-free, and you also want to shoot the new item down like a bowling ball, there has to be at least a second to adjust before engaging an ambush. I've missed whole battles (and art) trying to recover from the stash getting exploded.
As for rotation, I would recommend a V or U shaped stationary feature to nudge the orientation right. I *like* it messy. I love the random draw, I love that the characters change size, affecting the gameplay. It's like thumbing at every regimented inventory slot in every game's supposed satchel. For goodness sake please don't switch to discrete angles (too many apps lock to every 10 degrees like the math majors forget all of human history figuring how circles work!) It's not a boon to your fabulous irregular shapes. Just less drag-and-wiggle, more click and flick. Or make it optional. People with mobility issues are way slower with the former, and I think they'd really like a real-time battler that runs on its own.
Are there villains that would destroy items? Because that would be evil, mwahaha.