From wikipedia:
"Joint Terminal Attack Controller (JTAC) is the term used in the United States Armed Forces and some other military forces for a qualified service member who directs the action of combat aircraft engaged in close air support and other offensive air operations from a forward position."
I like to play PO, but I hate getting stuck with CAS because that usually means you will be sitting afk most of the game, waiting for the one time some SL decides to lase a target.
I'v played SL, and it's a lot of work. You have to organize the squad, watch the motion detector, use the flamer, blow the whistle, and on top of all that, mark targets for the PO, mortar, and the ships artil.
It's not hard to see why most SL's never mark targets.
What I suggest is creating one JTAC roll for each squad. Have one marine who's sole job is to lase targets for CAS.
I'm not suggesting taking away the SL's ability to lase targets, but having a dedicated marker would make the SL's and PO's life a lot easier.
It would also help fix the boiler problem, since they are pretty susceptible to CAS.