Yep HKG weather at this time of the year can be interesting but generally thunderies that move through.
A diversion enroute due destination weather in HKG does not sound right, have the alternate fuel and 60 holiding should be no issue.
Unless flow control advised something different? What were the European arrivals doing?
Just doesn’t sound right.
As for Manila, I say excellent controlling, traffic management and flow considering its crossing runways, one runway for heavies, infrastructure that gets smashed by the wx. I say they do a great job. Though yes always pay to double check the ole vectoring altitudes, lots of high ground for sure. Today though with GPWS and even TCAS both above help the situational awareness.
Back on topic why did it really divert? Medical?