Thanks to OP for thoughts. Our stay did not differ too much. Booked two twin beds room - on day of arrival got email noting we got upgrade into deluxe two twin bed room, but noted that if we preferred suite, regency (standard) suite only had one bed. Asked for suite and got email response confirming such upgrade very quickly. Also got one roll away bed. The suite's sofa is huge, so that can easily fit another person.
I thought the suite was well designed and didn't have a lot of wasted space. Knowing we were traveling with kids, we got eight water bottles places in the room each day. The shower and bathtub were put together, but the tub is HUGE. My eight year old could lay completely flat on the bottom. The shower has one handheld and two rainfall, and all three can be turned on at the same time. The hotel opened in 2019, and then went through covid, so the hard product shows no wear and tear, everything in pristine condition.
The breakfast spread is significant, comparable in quantity and quality to GH Taipei. Whether that is high quality enough for you probably depends on your expectation. Obviously it completely outkicks Hyatt breakfasts in the US. But it was a mad house with tons of family and kids on a weekday in July. We didn't wait, but it felt more crowded and hectic than GH Taipei. The group of Chimelong theme parks are nearby. Chimelong is trying to position itself as the Orlando of China, so the number of kids was not a surprise. The chefs at the egg station know how to make omelets, despite the large crowd and number of requests. They start folding the omelet before the center completely sets, so that the result is quite tender, unlike, say, the egg station omelets at the GH Guangzhou.
The regency club is nicely attractive with really high ceiling and windows. We partaked in one evening's spread. Nothing stood out as especially good, but they had a number of small plates, desserts, a noodle station, and a few hot dishes. Unlike breakfast, the lounge was not crowded.
The outdoor pool area looked pretty nice, and you could buy snacks or ice cream nearby. Camp Hyatt has a menu of prices, but the time we visited, we saw no staff and no one paid. It's not childcare, but it is a nice area for kids to spend some time. Overall this is a very nice option for those going to the Hengqin theme parks. Cash rate is low, and a steal for cat 1 on points for Globalists that seems to easily get upgraded. A few pics in spoiler below.