You can't beat the Hyatt Place when it's a cash and points deal. $55 + 4k points is one of the best values in the points world.
The question of this trip is not whether the Radisson Barbados is a nice hotel. The question is whether it is worth staying at a nice hotel or whether is better to save those points and pay for day passes at a beach club. Before I get into that, let's talk hotel.
The days of St. Regis New York luxury are over. Now, when I need a hotel in New York, I look for the cheapest option at the best location. The Four Points brand by SPG is usually an affordable option.
Sanya hotels are too expensive to spend cash and too cheap to use points. (see my post Struggling to Find Where to Stay in Sanya) My first hotel in Sanya was the Four Point Sheraton. It is a decent value at $80 a night but certainly not worth 7,000 SPG points.
Reviewing the Grand Hyatt Shenzhen after staying at the St. Regis Shenzhen is unfair. Although it's not as extreme, it's like the time I stayed at the Sheraton New York Times Square after staying at my favorite hotel of all time, the St. Regis New York.
Get out of the way Hyatt Hong Kong. Get out of the way Hong Kong. Shenzhen is not the New Jersey equivalent to New York. It is a bustling metropolis with sights, sounds, and skyscrapers.