lock changes to item.
It would be nice to be able to lock an item from any changes except when moving or grouping.
I find that when I move object around I accidentally resize them which then changes their aspect ration and then I have to start all over. It would be nice to lock an item from changes such as color, size, etc... but still allow the object to be moved around on the art board.
Consequently, if I can lock an item, it would naturally follow that an unlock functionality should be there too.

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Try to View > Hide bounding box.
This will leave you everything except accidental resizing and rotating.
When you need it back you can press Ctrl+Shift+B, or call Free Transform (which is broken though) by hitting E... or rebind Bounding Box to E :)