Congrats on the job offer Gazza
2) SQ only has regional business class (so no spacebed). Also SIN-PER is a measly 1.25 PPS sectors.
3) Not that I recall. QF qantas club isnt huge and is shared with NZ in the evening. SQ has a lounge open around their flights, but I don't think it has a separate F side.
4) I doubt it, at least until NZ eventually gets rid of 767.
5) I don't remember much if any changes to domestic QP.