Most players play the '36 scenario so im in favor or only the '36 and '39 (for people who dont want the pre-war.) maybe one at '41 at pearl harbor.
+1 to this. As much as I appreciate the ability to chose any date in CK2 + EU4, I find myself always starting at the earliest start date (867/1444). I would much prefer that the developers concentrate resources on making events more logical and interesting.
Actually the 1936 scenario is good for Asia, but it's too early to be balanced in Europe as it give the player too much time to tune his army.
I definitely see that as a plus, though I can see where you're coming from. I'm giving Paradox the benefit of the doubt and hope that the AI will hopefully be able to mobilize logically 36-39.