S!
Definitely Brewster Buffalo!Not the version US Navy used,but the one they sold to us Finns.It was about 30% lighter than the US version

Called by pilots "Pearl of skies","Flying beer bottle" etc.Had amazing K/D in FAF.
For Italians give what they want.Only 2 Italian planes so far,need more for balance.They had some very good fighters and they were also very cool looking

Give Brits Spitfires of some kind.Perk the monstrous ones(Mk14/Mk21).Mossie/Beaufighter as torpedo/bombers?Tanks(Achilles,Valentine,Matilda?)
US..well.They have almost everything.Early model of P38 and Frenchy's wet dream P47M(perk) could be given.Maybe B25J/H as medium bombers.Not the Bearcat.Yet another cannon bird

A26 Invader would be a nice addition.Tanks..Sherman,Lee,M10 etc.
Japanese need medium bombers,ground attackers etc.Maybe some late war planes too.
Luftwaffe should get more ordnance to 190F-8 to make it the mud mover as it was intented to be.Also give Hs129 too for same purpose.Me410 was primarily used for Buff killing.Bring it in!

Me163(perk),Me262(perk).Remove perk value from Ta152H-1.Tanks Tiger I/II(latter perk),Panther,Jagdpanther,Skdfz(German M3),Wirbelwind(4 x 20mm AA).
To make use of any of the GV's a good map with some kind of perimeter defence on cities and airfields(had them IRL) would be needed.Off map flying penalized by explosion of plane.My thoughts on additions...
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DB603
3.Lentue
Lentolaivue 34