Yaks
A-20
Boston III
TBM
B5N
D3A
F4F
FM2
T-34's look to be outdated.
Ju-88
B-26
Ki-67
SBD-5
Ar-234
Both 110's
Both C2's
Ki-61
Me-163
There's the entire list of planes that need to be updated. That's 21 planes total, and we have about 100-ish planes in game? That's nearly 25% of all planes still at AH1 standards.
I do not know the specifics, but it seems to be your list could be divided in to 2 groups. Original AH and then maybe a "AH Mk II", both generation 1 planes I'm assuming. Look at the A20 cockpit, then look at the Yak cockpit. The A20 has some "3D" boxes and flight controls while the Yaks do not. There are others as well. Sure, they both are obviously very early AH and both could use an update no doubt. Someone mentioned that if the rudder peddle move then they are "AH2" or have been "updated" at least once, if not they are original AH.
HTC only has so many resources and to apply towards upgrading/updating aircraft. The most recent is the Lancaster. Previously it was the Hurricanes. Before that it was the P40's. Give them time, they will get things done. So far, the IL-2, Me262, F6F, Typhoon, P40's, Hurricanes, and (I'm sure I'm missing a few) have all been updated to the latest and greatest graphics. I believe the P51's, Spitfires, and P47's have the updated cockpits. So in short I say this: give them time, they're doing just fine.
Oh, and the T34/85 was added just after I started playing AH in early 2008.
To those who are wondering which of the He111 "H" variants we're getting... after digging a wee bit I think we're getting the H-2 variant with the 5/MG15's. Also, by looking at the picture of the bombs falling from the He111 it appears as if HTC did in fact model the upside down bomb suspension in the bomb bay. If in fact it is the H2 variant, it will have the Jumo 211 A-3 engines w/ 1,100 hp. We'll have to wait and see once the new version arrives as to what, if any, new ordnance we'll get along with it.