Great report.
But daylight flights in both directions ... that's rough (for some).
Your story about the Silver Kris at Changi made me smile ... SQ really know how to treat their own customers well and others ... not so well. I had a nightmare code share flight with them from AKL-SIN-BKK a couple of years ago using a NZ ticket.
I know Changi may not be worth leaving but here's a great hotel in Singapore - The Rendezvous. 5 star luxury. Corner of Ben Coolen Street, right across from a major food court/hang out. In their complex, there's a ultra cool and cheap 24 hour internet cafe. The hotel usually runs S$130/night, booking an internet special.