GOOD PLAYERS are always in demand.
This, more than anything, this. If you're good at what you do you'll find a home regardless of your role.
Take me for example. I'm a decent tank and an exceptional healer (multiple top 200 world rankings including a #7 overall when i still played WoW), yet my Ops main is a Marauder. I wanted to do something different in SWTOR, so I put in the time to learn gearing and rotations for all 3 specs, strengths and weaknesses, etc. End result is I've got a secure spot on an Ops team in the least desired role, and my guild does not want me to switch.