The discontinuation of shuttle to Wanchai is definitely sad news. I remember the last time when I took it a 3 months back, the assistant manager was on the bus to greet us. He was aware of my diamond status and extended a warm welcome.
Speaking about points, I'm not sure if it's the greatest use of points if you're looking for the standard room, since they run at ~700 RMB (perhaps because I used a corporate code). I used the points for upgrade to the suite and that was definitely worthwhile.
It sounds like the direct train to dongguan from hk option is less of a hassle. Are the taxis from the train station to hotel safe?