After reading aerelms and Trogdors post over and over again, the problem that causes cloaking almost impossible to balance out is the fact that BS and Large transports share MK 3 , Cruisers, some BCs and small transports ( and GBs ? ) share MK2 and snubs ( except for some heavy heavy bombers and SHF ) have mk1. However since the purpose and capabilities of these ships are pretty much different ( fe. a Lib. Carrier and a Mastodon ) the same camo parameters can't be applied to both of them, cause imo. a battleships should have the equipment and the capability to hide for an extended time ( survailance, recon, or just staying out of sight till reinforcements arrive ) however, transports ( since I don't think they are made with military grade tech , or at least most of them aren't ) should not have the technical capability of using such an equipment for hours.
So I'm with Trogdor on ( if it's possible to make) having different cloaking devices for the different classes could be the start of this whole balancing thing, since then , when there is no fear of ppl explointing the fe. 20 minute cloaking ability of the BS cloak on a transport , cloak charging times, ammo/battery - I think we should call it batteries - consuming and all that could be calculated. For each ship class individually, taking other stats of that class into consideration. ( cruise engine start, cruise speed, etc. )
Sidenote: Pardon my grammar, I'm at work and I still suck at fast writing in english