I wish iOS on iPad wasn’t as locked down as it is.
I wish the iOS appstore were more conducive to business models that foster pro apps.
I wish it had a command-line, even one that’s partially segregated like the WSL.
I wish it supported external mice/trackpads because text selection sucks (and will always suck) with touch, even with the fake on-screen trackpad.
I wish its support for saving web apps to the home screen wasn’t unusably buggy. (Refresh! Refresh! Refresh!)
I wish it supported pointer events for the pencil.
But more than anything else, I wish for gatekeeper for the iPads pro. With a machine that powerful, you should be able to enable side-loading of signed apps.