I'd like to see stealth used more tactically.

My first choice would be a cooldown. Would force spies have to decide which tool is best for the situation and lessen their control over every engagement they currently have. If you want the extra safety take a longer stealth and risk sacrificing constant pressure on an enemy for that extra safety. If you want to apply more pressure take a shorter one but risk not getting away as easily if things go wrong.

Second choice would be a punishment for repeated stealthing; I prefer the SI option as drugflash is easily combated by taking a drug and lower levels of DF are negligible. I personally think the 3rd stealth of any duration should carry noticeable hindrance.

A way for tradeskillers to access stealth without impacting their dex tradeskills too much would be good too. Tradeskill PAs with a high TC bonus and combat malus?