Hopefully your experience (though unfortunate for you) was a blip, because I have not had a bad experience there.

Some of the things you have pointed out are issues that you see in any Japanese hotel - gyms are not open late and they tend to be warm (the GHT one closes at 9PM, doesn't it ?), and the VPN issue is one that I have had trouble with in many luxury hotels. And like other international Hyatts, Diamond status doesn't automatically result in the benefits you get at other properties.

Anyway, good to point out where there were trouble spots for next time.