While I'm excited to see additional lift to SIN - one of my favorite places - I am sad to see the end of HKG-SIN as well.
My favorite MR is EWR-HKG-SIN-SFO - just did this last weekend as a matter of fact. I'm guessing upgrades will now be all but non-existent.
Maybe with enough griping they'll bring back the 737 between HKG-SIN instead.