Not a commuter, and I've only used the IVR JS system a few times. Interested to learn the rationale behind preferring FCFS to the hybrid system? I think the old-school pure seniority system is BS. Pilots losing commutes at the gate due to a seniority # duel is bad for pilots and the company.
I personally like FCFS, but then I'm pretty junior. It seems reasonable to move to a hybrid system where a senior guy who is flying when the system opens still has a chance to get the JS, but slackers who couldn't be bothered can't bump us at the gate. What am I missing?