I agree the execution of the end of GoT was bad (i.e. the problems weren’t just the issue of everything needing to come to a head). There were a lot of different complaints about how GoT ended, but I definitely saw a lot about how it was all just battles in the last season and no nuance. I think that was always going to be hard to avoid given how GRRM had set up the main plot. And I think he will find it hard to avoid when writing the last 2 books, which could be part of the reason he doesn’t want to do it.
The thing is even if AI could do all that (which is doubtful in my life time), you would still need someone to prompt it with something interesting. And CEO types have never had an interesting idea in their lives