shocktroops, para, and commando are basically different way to handle the smg.
the shocktroops have smoke grenade by default and they are the most durable squad in the game by far.
the paratrooper (should) have the best dps.
commandos have stealth.
first, nerf the commandos grenade damage and dps. The commandos should have the lowest dps out of the three elite smg in exchange for stealth.
Paras are also more resilient to model losses since the first two deaths will just take out 20% of the max close-range DPS compared to, say, Shocks losing 33% DPS.
And yeah, I'd definitely agree Mandos need a pretty distinct DPS reduction with their current stealth frankly providing them survivability potentially even better than that of Shocks. (Turn on hold fire, walk on area around VP that got hit with AoE a lot during a fight, all chat I'M SNEAKY!, then probably score a squad wipe)...but I'm particularly in favour of making said stealth less silly to make said DPS reduction require being less severe. But of course, their current DPS is still quite overdone with the rest of their complete package.