While having close air support is always laudable, I do have to wonder if going back to "Contact Patrol" fighters is really an improvement? (For historically minded people, Contact Patrol fighters were armoured biplanes brought out in the last days of WWI to conduct ground support missions with bombs and machine guns in support of "Plan 1919". The Sopwith Salamander and Buffalo were the single and two seat examples of that philosophy). Today, we can fill the sky with sensors ranging from small UAV's to helicopters and high flying aircraft, network their observations and dispatch a multitude of weapons to service identified targets, including artillery, helicopter gunships, glide bombs which can attack targets from 100 km away and other tools. Even ground launched missiles can have "man in the loop" capabilities and operator override whale being able to service targets up to 60km away (Avibrás FOG-MPM).
The reasoning for "low and slow" was pretty clearly defined back in the Viet Nam war when Skyraiders (aka "Spads") were much more valuable to the troops than "fast movers" like the F-100 or F-4, and a plethora of jet and propellor ground attack aircraft were developed around the idea.
Fast forward to today, however, and even a handful of Spetznaz operators with handheld MANPADS essentially swept the skies over the Donbass from Ukrainian airforce SU-25's (which are the Soviet era analogues of the A-10) and you have to wonder how well a large, manned platform will do in these sorts of environments?