Personally? No, i dont think Scum is the hardest anymore. I think it goes
1. Rebels
2. Scum
3. Empire
Scum has so, so many options now it's pretty crazy. Empire is super easy to build a squad for, basically every ship with the exception of the TIE Bomber/Punisher and the Firespray can easily be made to work.
This is, of course, assuming you have most everything Scum has in it's arsenal. if you don't have very many ships, obviously it's going to be hard to build a squad.
Edited by Razgriz25thinf