Regarding your Book 6 plans.
I belive it would be better to make 2 books out of your plan. So the Book 6 would be pretty muvh what you have in act 1 but with all the usable 70 min of Book of Boba fett footage and then have it intersect with Bo katan training Mandalorians.
And then have Book 7 be what you have planed in act 2 and act 3 of your current Book 6 plan.
I think that would be better and insted of having 1 nearly 3h film you end up with 2 films around 1h 40min.