Literally all this commander needs is a price decrease (since I doubt the debuff is going away) for Fire Up and Flares (should be equivalent to PanzerFusilier Flares at 35 munitions). Just like that it becomes useable.
If we combined flares and fire up into one package since theyre both cp2 anyway, rifleman field defenses is the ONLY thing I would add, since it perfectly fits the theme of the commander and gives it something meaningful early game.
IMO flares shoulnt be cheaper, like the pfussies ones because they could be used against MG42 and thats countering the best MG for 35 muni. I know, 45 is way expensive too, the ability is very useful but there has to be a way to stop its spammability, since USF mortars are good as OST ones but the latter cant have flare support in any way. Also a standard OST relies on positioning and ambush and that is hard countered by non risky map exploration such as flares.
If riflemen were able to use once the flare until they retreat, at a much lower cost (10 mun or free) would be ideal for both sides.
IMO E8 should stay in the rifle commander, its a good enough tank that can give a needed edge against bullying Pz4s. Either that or swap E8 with M10s with a reduced cost. The combined force of mortars+rifles with good tools and mobility+fast medium TD sounds interesting against OKW aggresiveness and to deal with some aggressive openings from OST.
I would like to see some combined tactics for riflemen too. I.e. giving 2 new abilities: Fire at will (slows the enemy infantry movement and reduce damage taken and done) and assault (gives extra movement speed and moving acc). With this two similar riflemen can perform very effectively an assault maneuver to any other infantry/MG. It will force the enemy to reposition at least.