So since this is USF we're talking about there is a 99% chance that you'll get Rifleman, Rifleman, and wait for it... Rifleman?
In seriousness, that would be cool if it was like a super USF slot machine that included all non-doctrinal units so there was a chance you could get Paratroopers or Assault Engineers or whatever. Hard to use and a gamble but could give you neat toys to play with
The way I look at forward echelon company would simulate a really light infantry army holding the line while you play slots with non-doc toys, pretty much reinforcements coming from another battle area. This would be a really cost effective way of making a lategame army if your good with all USF units and can balance the MP cost. Infantry Company had this is in vCoH.
I think making it include doctrinal units might be too much- imagine how amazing you'd feel if 3 Wolverines popped up instantly, and compare that to getting 3 assault engie squads.