In order to "totally forget" our mouse during the flight "attack" phase, the lonely switch remaining (after a "soon master modes implementation" ) will be the Master Arm.
If you have a lot of time to spend and absolutely want to create a brand new panel (), during the "take off, approach and landing phase", several switches, mainly on and around the "Gear Panel", would be very useful like Gear and H²O of course, with anti-skid and gear lights. (using the mouse and your eyes inside the cockpit in downwind, reducing speed below 250kts at 600ft may be "dangerous" in this aircraft ... )
The only indicator missing at this time is, perhaps, the fuel panel but, unlike the warning panel (too small), the fuel panel is easily "readable" directly in the cockpit.