AH Spit9 outclassed by the Bf109G-6? Or the Fw190A-5?
You gotta be joking.
It's gonna take helluva teamwork if the G-6s or A-5s meet Spit9s on equal terms, and that still wouln't mean up to snuff since mission theater will offer organized Spit pilots, unlike the dinky bunch in the MA!
However, I agree on everything else, as I myself advocate the introduction of either the G-14, G-14/AS or the G-6/AS.

Bf109s and Spitfires are unique. They met both the opening and closing of the war, and evolved with those rough six years that came to pass. No other single fighter type was so universally used throughout the wat as Spits and 109s have.
So, more 109s and Spitfires are always welcome.
However, the lfMkIX and the G-14(or 14/AS or 6/AS)... should remain low in priorities. Maybe after the IJAAF, IJN and VVS sets are well represented?