Depends on the restrictions, John. In the air-to-air (defensive or offensive) performance (speed, manoeuvre, altitude, etc.) is vital. We've already seen significant reductions in some of these; more could seriously degrade effectiveness and survivability.
I'd love to feel as up-beat and confident about it as you clearly do. Yes, there will be lots of toys to play with, but the toys aren't much use if the performance is further limited.