Dont see why. ENY would still be in place and many like perked rides.
Because, ENY doesn't work. 100 I-16's will still wail the crap out of 30 La-7's.
That and we have the oddities of ENY listing, like the 109K (ENY 20. For comparison, the 110G is at ENY 15, IIRC), a couple of the spitfires (Mk VIII and IX, I think), 190A5 and A8 (ENY 25), 109G-14 (ENY 25), 109G2 and G6 (ENY 30), P-38J (ENY 20), P-51B (IIRC, its at ENY 15 or 20), C.205 (ENY 25), La-5 (ENY 20), Yak-9 (ENY 20), and others.