Usually you take what the airline gives you. They may have an alternate one but you need to contact either res or your travel agent if he booked it for you.

If none available, then you're stuck with that. CX would provide transport to/from hotel too.
The point of a STPC is for you to stay overnight as there is no immediate connecting flight available. It's not for you to go out for shopping!

It's a great hotel so don't know why you're complaining about...And it has complimentary transfers to Tsim Sha Tsui!

http://www.royalview.com.hk/