>why is there (almost) no upper back work?
Define upperback. If you mean thoracic spinal erectors and traps, there's enough work for powerlifters.
If you mean lats, there's lots of deadlifting. He does include some space for "lats accessories" in other programs (see the advanced ones).
If you feel you need to include more work, you can just do a few sets of chinups or pullups after the main stuff. Facepulls are not really needed, as those muscles are worked on the chinup/pullup, but you can do it if you want.
You gotta keep in mind that Sheiko is a program specifically for powerlifting. It's not for bodybuilding.
>is it ok to do regular deadlifts instead of block pulls
You can make a stack with plates or use those EVA blocks if the gym has them.
Alternatively, you can do a regular deadlift, then lower the bar to knee height and lockout again, for however many reps needed. Kinda like a higher RDL.
>what is the point of the "deadlift up to knees"?
Improving technique and strength, working on weakpoints, getting more volume in, and managing fatigue.
>can i just do regular deadlifts instead?
I'd recommend following the program as is at least once before customising the main lifts.
>how big is the deficit supposed to be on deficit deadlifts?
10cm or so
>how the fuck do i do seated good mornings?
youtube.com/watch?v=ZYGr_OmM-yw
>can i do The Press instead of french press?
Yes.
>are the dips supposed to be weighted?
Whatever feels comfortable for you. It's an accessory.
Looks fine to me.
>Option 1
>3x5 at 85% 1rm
>Option 2
>Daily max and then 5x5 at 75% 1rm
What frequency? How many lifts follow that pattern? What accessories are you doing? What variations are you doing? What's your progression plan?