I think the USAF is jumping up the wrong tree here.
I'd go for much more adversary training on the sim.
Have a large team of bad guys that can play over the internet against real 'players'
Say enough to operate a big package of bad guys :
You want us to simulate a force of J-50's - for a Japan based unit - Done
Next day fly Su-30 and Mig-29's - for European squadrons - done.
Expensive to have enough sims to make it work - but cheaper and more effective (What can a Mirage F1 simulate ?) than this Red Air fleet that seems to grow faster than the USAF declines.
Note the adversary sims of course don't have to be great cockpit simulators - just a generic fighter - Just enough to let a real pilot fly it - see targets and represent an opposition machine.