No they do not need to Simplify Jobs in what world do jobs need to be simplified? They've been simplified so much to absurd levels no way can anyone be serious saying they need to simplify jobs further.
Jobs can have less skills and be more complex by the way, the amount of abilities doesn't automatically mean how complicated a job is. A actual good way to do this is add depth to skills, add chance and randomness to rotations, let jobs feel different.
The only bloat I see is mitigation bloat on tanks and heal bloat on healers both roles need less free value skills, Healers should have the complexity that if they run out of resources (which should happen) they need to spend gcds healing while keeping up their damage procs and skills, Tanks need less random mitigation skills that all do the same thing (raise your defence and like heal) rather having a self mitigations, party utility ect. While keeping up a actual fun rotation that isn't bland spam 1, 2, 3 and burst.