Just comment on the 4lo, he successfully did 4lo in US Classic and JO back 2017.It's still not 6 quads Chen's program in Oly season - but even he can't do that program again with new repetitions rules - unless he is gonna learn 4Lo.? Obviously.
But you are right he is not going to have 6 quad program soon, as he has no intention to bring it back this season. He tried last year but gave it up after JO, probably because he is training mostly by himself without supervision, while learns to balance school and skating.
He has other goals this season. So we would probably won’t see 4lo until he quits school and is training full time with Raf. Sasha might do it before he adds it in the program.