LPL is certainly not over crewed. Many Captains hitting 900 hours meaning people being drafted in from all over the place. F/O's hitting duty hour limits due to the ability to work them to death on the flexi contracts. It's a mess but unlike anything seen at any other EZY base.
The 757 went back to LGW 3 weeks ago. It was of little use as there were significant technical issues which caused more hassle than it was worth - especially fitting 200+ pax onto a spare A319.
The problem at GVA is the night curfew. GVA are running zero tolerance for anyone hoping to leave after the time. If there is a delay Ops try to plan MAN-LYS-LPL but on most occasions this is not a workable solution as the aircraft and crew will get stuck in LYS due crew hours.