Not good at all. Almost no way to get to SIN from HKG.
For those of you who like to connect through HKG, this new launch is a terrible option. I don't think UA gives any reasonable fares of EWR/SFO/ORD-SIN. If you want to transit HKG, you almost have to just get two separate tickets and wish UA that they checked all the way through. Connect through NRT basically loses out 3300 LT miles, which is a big loss. I did see the fares of EWR-ICN through NRT and the OZ feeder to be much more affordable now.
Let's hope there will be some new fare basis to still allow people to get to SIN late at night.