Current planeset = FUN
Current planeset + additional planes = MORE FUN
Got it? Sure!
I don't disagree that having more planes in the planeset would be more fun. What I disagree with is the "It's been a month; drop whatever you're doing and give me a new plane" attitude (I keep getting the mental image of an five-year-old kid screaming "But I want it NOW!"); having done software development for more than twenty years, I know that there's a
lot more work going on behind the scenes than just what you see in a new patch or version, and yanking the production staff away from development just to crank out an incremental release delays the next version.
For myself, I'm hoping that somewhere down the development trail, HTC gets far enough ahead that they can do some of the 'planes that almost were' for an occasional "WWII:1946" special event -- the planes that amost got into the war: P-80, F7F, F8F, the really late-model P-47s, Do-335, Go-229, Ta-183, Shinden, Kikka, Shusui... But that's likely to be a long time coming; there's still so much more that can be done with the planes and vehicles that
were widely used during the war, as well as the sim itself, that the 'what if's and 'might have been's are so low-priority they're not even visible.