The video doesn't mention that the tower is a lot of reinforced concrete, not steel as in most high rises. That makes it much heavier than other friction pile buildings which is at minimum contributing to the problem. IMHO I think it's insane anyone proposed not drilling to bedrock and that the city ever allowed it. In an earthquake zone bedrock piles should be an absolute requirement for tall buildings.

Last I heard the modified drilling procedure didn't help and the accelerated sinking hadn't fully stopped so right now there is no plan to resume.

When the pile drilling started lean was 17". In less than a year of that work it's now 22". By building settlement standards that's blindingly fast and makes me think the soil on that corner is in much worse shape than anyone assumed... possibly bad enough it won't hold in a large earthquake. It may be a more complicated interaction than just compression due to the load.

I'm not sure what they can do at this point. Have a bunch of crews get the piles installed as quickly as possible and hope you can do it before the sinking becomes dangerous? Given it is a concrete building rather than steel they probably can't do much to reduce the weight but moving everyone and everything possible out might help a little. To counteract the leak maybe they can drill on the other corner (that's always been part of the long-term fix) to get it to settle at a faster and thus more even rate?

Definitely a difficult problem.