Does the new firmware incorporate what CK has submitted
No
Does the new firmware incorporate what CK has submitted
Unknown, CK might have to make a few tweaks.
Anyone know if the changes CK made will be put into an official Bitmain update so it is not lost on hard-boot?
In time, engineers have only just seen the code and will have to investigate the changes.
As for US residential powerlines... this should be a major design concern for Bitmain or any other miner mfgr because PSU's do NOT like low lines... In Detroit area home power is 110v - not 120 - and during summer will often drop to 100-105v. The '220v' incoming reflects the same drops. This year it got so bad (hit 95v for 2 weeks) I had to wire in a boost transformer to make up the difference...
I'm not sure anything can be done for that. The vast majority of the market doesn't have that problem, and one which will affect all electronics.