There are a dozen or so excellent types that would make great additions.
My personal prefs are:
Beaufighter Mk21 - THE anti-shipping platform, and it's Australian built..Crikey!
Me-410 - An excellent german Jabo and if flown correctly with the big gun could be the a/c to menace the eventual introduction of the B-29
T-34 76/85 - The lack of an AA wep is of little importance. This is THE russian tank chassis, and since when have you thought you could really take down a marauding Typh with that peashooter anyhow?
Ju-87B/G - Bub-bye pesky Osties....and the siren makes me all hot!
SM-79 - Major player in the med. Anyone who wants to take on the CV's with a torp deserves a go...and I dig chicks with humps..
Ki-43 - Numerically one of the most important JAAF types. An excellent early pacific war a/c.
He-111H - Ok so it's more german iron, but if you want to do the early war properly..HELLO!
P-39 - Big gun go bang
M4 Sherman - The basic model, or you can purchase all the factory options (including the 17pdr upgrade) so it can actually damage the Tiger...before being killed
Ki-84 - Possibly the only time your truly glad to be in a Japanese plane in the late war MA
B-29 - Him plenty big medicine
Brewster Buffalo - Pleeeeeaaase make the bad finnish people stop!
Ok, we've got it. Why not use it
Spitfire MkVIII, LF MkIX
Ju-88G/188
Me262 A-2a
B-17F
Mosquito B.MkXVI
P-38F
Yak-1 to 9T
Awww but what about?
yes eventually ...maybe ...sorta
Panther G
B-25
B-24
Halifax III
Re 2005
Meteor F.Mk1
G.55
P-47M
G4M
Ju-52
etc etc etc.....
and yes there are NO Flying boats...after all, who wants to bob around in the water, waiting for MAYBE a pickup?
Tronsky