I find the layout of the icons, and hence hotkeys, for walls, gates, outposts etc extremely illogical, so what I would like to be able to do is to change the hotkeys, and have the layout of the icons change to reflect my chosen hotkeys.
For example, I would like to have tower in the bottom left, below outpost, so I’d like to be able to change its hotkey from F to Z, and if the user has the “icons follow hotkeys” option selected, this should move the tower icon in the panel to the bottom left (obviously I’d expect to have to also change the gate hotkey from Z to something else, to remove the resulting clash).