BigCrate,
It is much, much easier for them to do a varient of an existing aircraft than it is to do a new aircraft, so a Spit 14 does not equal a P-40.
I agree that a valid case can be made for the P-38, but consider also the late war nature of this game and the fact that the most mordern Spit in AH is from 1942.
The Spit was the main British fighter from 1941 through the end of the war, and there have not been representative Spits for that till now.
There are 5 109s and 5 190s (counting the 152, which I do) because those were the mainline German fighter through the war. Unlike the British planeset, they already had 1944 and even 1945 stuff, not just 1940-1942 stuff.
FWIW, I'd be quite surprised if 1.1 doesn't include a P-40.