They're going to be amazing planes to fly. I got to fly the -229 powered F-15Es at lakenheath, very very powerful. Those single seat birds will have amazing performance. Still won't have F-22 maneuverability, but as an interceptor they'll still be world class. The addition of the newer avionics and greater missile loadout will be useful too.
I think a stretch F-22 with updated materials and engineering to make them easier/cheaper to build and maintain would be an ideal solution and could possibly save money on the next fighter procurement program, but that isn't going to happen because congress.