Maybe a high wing version for really rough strips?
The A-10's low wing is to allow for landings with collapsed main landing gears. Notice they're in wing pods and the tires are exposed. The wing also somewhat shields the engines from ground fire at certain angles while the A-10 approaches.
The engines of the A-10 are well above the main wing, for exactly the reason you thought of “high wing”.
The wings mask the engines from below, keeping the inlet air as “clean” as possible. The rear stabilizer also masks the engine’s exhaust from below, reducing its IR signature.
All in all, it is still the best thought out design for a GS aircraft ever built.