There are many, many players who would find historical matchmaking far more fun, myself included. Just look at the number of players requesting, or the popularity of historical sims.
In terms of the game mode I’m proposing, “balance” is something that should be pursued between opposing sides in the battle, not between all aircraft on the battlefield. You need to consider the battle as a whole: For each “underpowered” A-10 flying in skies with MiG-29’s and Su-27’s, there are Su-25’s flying in skies with F-16’s and F-15’s. The A-10 - a CAS specialist - doesn’t need to be “balanced” against fighters of it’s era. It’s inherently balanced against other CAS specialists of it’s era.
This is a positive to gameplay. Imagine, for instance, if the “capture points” in EC overlapped with the generated ground battles, and to capture the air point, you had to be at, say 2km or higher, ideally with larger maps and larger capture points / ground battles: You can then create an environment where fighter players are incentivized and rewarded to provide fighter-cover for CAS players. With a map that properly balances map size with engagement range and provides a wide enough selection of ground targets, CAS players will have the option to ground-attack at a point they know they have fighter cover at, or to seek out possibly “safer” ground targets farther away from the action.
The Alpha Key doesn’t have RWR to know if something is nearby, and that’s fine because the Alpha Jet, in real life, didn’t have an RWR to know if something was nearby, and so that should be part of the experience of flying an Alpha Jet. That’s ok. People will still fly them sometimes. I’d be one of them. They might fly them only in safer environments, or when they want the risk and challenge (or the meme), or have other planes in that lineup if things get too hot. All of that is ok and good, because it widens gameplay. It makes it more interesting, and makes the choices of what you fly out more interesting. It makes it a more interesting environment to fly in, too.
It’s easy to imagine a scenario where aircraft like the Alpha Jet, in an EC RB historical match, are free to spawn and don’t cost your team tickets when they die. Similarly, the top-end aircraft of an era could cost increased tickets on death. Just a random off-the-top-of-my-head example. There are so many gameplay ways to achieve “balance” that do not involve the literally impossible task of trying to balance individual vehicles against each other.
The idea that players will always spawn in the “best” plane is simply not true. Some players are like that, sure, but not nearly all. How many times do you see props in jet battles, or an M22 in a high-tier ground match? Plenty of players spawn in what’s fun. And I - and many others - find it fun to play in a historically appropriate environment, how “good” the vehicle is is irrelevant.