Is the cryo drop capacity for roleplayig purposes, or do you plan on doing boarding actions with that single marine company?
I can actually think of one reason that it stands valid, actually, and that is anti-boarding combat. Though, the AI doesn't really seem to do boarding combat, unfortunately, but when you're doing even a little bit of RP, troop capacity: company modules are ussually low investment ways to ensure a hypothetical enemy can't Git on your ship without a fight.
That said, I don't know if troops in drop pods will engage boarding enemies, let alone cryo drop pods.