Actually it does, delaying puma and flak HT, increasing window of opportunity for allies to use light armor against it and most of all, it will put a decision on OKW players-early trucks or early vehicles.
Stat changes are not the only way to balance a unit.
The only reason I am not having a good time vs kubels is because by the time I have m20, the enemy is having a fast Puma and Jaegers.