190a5s and a6s were replaced in mid 1943 with 190a8s. By spring '44 almost every 190A fighting in frontline units would be an A-8. They shouldn't be capped at 15 max. Compared to F4us and especially FM2s and seafires, they are heavy and very easy to kill. There shouldn't be that kind of planeset.
If you're trying to funnel the majority to 10G6s that's one thing, but keep in mind our G-6 is the earliest G6 model we have. It's from early 1943. By 1944 there were much better variants available, all using the name G-6 as well.
I would suggest removing the A5 entirely, making no limit on the A8 (or at least giving it a generous max), and also put in a healthy 109G14 supplement (perhaps 24 max?)
I know you're going for parity with the Stuka, but by 1944 the only Ju87s flying that *I* know of were anti-tank Ju-87Gs. The Ju87 was removed from frontline duty by then, replaced by the Fw190F-8.
On the allied side we have the problem of the seafire being the mk.II instead of the more common Mk.III. Would it be possible to enable some Spit9's perhaps to replicate the better performance of the Mk.III? They are considerably lighter, having no carrier gear, so perhaps also limit them same as 109G14.