Play it first, propose changes later when you know how it actually works.I have played it. 3 games so far against some friends. won every match so far.
Btw, 5-minute light vehicles have been in the game since forever. Soviet Clown-car and US AC have always come out fast. Though I agree with you that light vehicles should come out later (or be weaker so as to have less impact on the game) Would you agree that allied light vehicles should also be delayed or just OKW's?
Even when I didn't rush lights, and let the game drag on I was easily able to roll him after I got 2 P4s.