To support users coming in from several platforms, it seems much better to use the hotkeys that they are accustomed to use in their regular Offline Schematics Creator.
So instead of using Flux specific new keys that are pole opposite to what everyone is used to, why not keep it simple and easy to adjust.
For starters, hit the"Space Bar" or an "R" to rotate a component. "F" to Flip a component etc.