Nice review. Stayed there myself last month (June 2024). We got the same suite which was quite good but used NUAs (titanium). Breakfast was offered for free in the restaurant even though the lounge was there also.
We also made good use of the leisure facilities which were very nice. 20m lap pool, sauna, steam room and jacuzzi. Apart from the pool, all the other facilities where separate and duplicated in the male and female areas.
My pictures are roughly the same but have added the lounge times to aid people in the future.
Lounge times for JW Marriott Chengdu