Do you get more from having BB-8 and PtL than you lose by only making green moves.
If yes, it's probably worth it, as long as you don't pay too much in squad points.
If no, then it's probably not worth it.
The other thing to consider, are you only ever going to do green moves? I'd argue not, and I'd argue that most of the times you do a green move, you were probably going to do a green move anyway BB-8 or otherwise, so it's not really restrictive at all.