While it might be getting into the area of stuff you don't want to talk about publically, I'd still like to ask. As it stands now, what mechanism does ENY give better numbers through? Do people log, or do they switch?
I dispute the idea that an overwhelming force flying slightly worse planes has any meaningful impact on the experience of the outnumbered side.
The 3 sides have never been better balanced. The ENY does not work on per-session scale, it works globally - if every time in your regular hours you get hit by ENY limiter, it means you should switch sides and then
stay on that side for an extended period (days at least). In other words, it is supposed to annoy you on regular base till you finally get the message and switch.
Entire squadrons can move in this way, as opposed to per-session switching. In the long run, the sides get balanced, at least statistically. It does not work as well when very few players are logged in due to small numbers statistics.
Limiting the lowest ENY planes probably has negligible direct effect on base capture effectiveness - but that is not what it is intended to do.