I can see how that can happen, since you have the option of hoarding the entire game until you get one super-tank, or just playing normally but never getting any super weapons which kinda dulls the light they shined on them.
Unless some of the light armor is extremely effective as well?
You have seen the trailer, imagine what would be if it featured actual viable BO of armored combined arms.
And since the faction is going to be somewhat resource starved it makes sense to make that decision.
I for one am happy that we might get armies that for a change need to ask themselves "WHAT to build" instead of "WHEN to build".