I guess the W Sentosa hasn't sorted out their upgrade priorities.
Just checked in this afternoon and was informed that they've already assigned me to a Marvelous Suite.
I'm a lowly gold, trained to expect nothing so this was quite a pleasant surprise, especially when reading about the plat experience above. (Therefore created an account to share after lurking for the longest time)
On the transportation side, yes it's taxi all the way, and one thing to keep in mind it is so far out, there are no taxi's that will just be dropping by, it will likely be a long wait even if the hotel helps call for one. I spent a good 15min waiting for a called taxi when heading out today.
The shuttle is available from 10-7, stopping by Vivo City and Orchard Road. They also indicate there is ONE morning shuttle that goes to Vivo City, Marina Bay and Raffles Place before 0900 for those heading to work. ONE return shuttle at 1830 at Raffles Place and Marina Bay as well.
Will explore the hotel more and share.