There are problematic units already in game but there is little reason to create more.
And you seem to fail to to factor in other characteristics:
Fall would lose more DPS with each model lost than PG especially at long ranges
Fall come later at CP2 when one has all ready invest in infatry
Fall get 2 weapon at start and have to wait for T4 to their upgrade
Fall are a doctrinal unit that with current design has to compete with Obers
LMG unit with Assault rifles will simply perform too good vs other infantries even at "preferred" range of the enemy infatry, they could stay at long range and snipe models at max range vs mid oriented opponent, close in vs long and wait for CQC to close in.
This type of design with units that perform good at all ranges simply makes "relative positioning" allot less effective.
Did you ignore the part of where i said the upgrade would require t4 to be built and 120 MU + it actually increases their target size by 25% on uograde???
But Allied infantry already perform better at ost infantry's preferred ranges any way, So why should this be a consideration at all, or is it a balancing doctrine that all allied infantry have to designed with the basis 'THEY HAVE TO WIN' against ost infantry. All allied cqc/mid units already out dps the pgrens (lmg have around the same dps as stg's around) and all long focused allied unit beat lmg grens so i really don't understand the point. Like do the test you self in flat map realism and see if you find that weather dedicated units does actually loose or not.