A lot here to respond to...
I'm just going to comment on a tiny piece of it. With regard to homework and busywork in general, I frequently recommend an accommodation variously worded as "quality over quantity", "items sufficient to demonstrate mastery of skills and concepts", or, more generically, "reduced workload". Typically, this is for students with slow processing speed, or fine motor deficits, but I've also used it with highly advanced students (usually 2e, in my case).