That's one of the least desired bonuses for most players I suppose. Personally I'm sitting at dozens of thousands Comms on my main characters, despite constantly using them to produce potions.
BTW: could you adjust a bit the potions that those Commendation can be turned into? Currently one of the options is a potion that gives +2 insightful bonus to all stats, ML: 20, while at that level we already have +4 insightful from gear. Maybe change that bonus type to alchemical?