if i went into minutia or like changes starting in the latter half of next that would affect gz i would be here angry for like 5 hours so im not doing that but the tl;dr is i'd make all the g characters more prominent and q4 like supporting characters at most. there's several ways to make tokoha/kumi/amluna more directly involved in the plot but my way of choice is to diffride mamoru and satoru and have them be apostles (mamoru specifically would also fuck up ibuki which is fun). i think gyze!chrono is a superior choice to kazuma bc they literally could have just worked in the same conflict they had while chrono was fighting gyze ("should i have never encountered vanguard??") and made it more corrupted ("would everyone be happier if vanguard didn't exist"), also the kzkr "i know you're in there" fight i feel would have been more compelling the other way around (tho i did like how it was done regardless). i'd make the apostles more hardy because making them disappear upon one loss with using a zeroth dragon was nutso as a writing decision when these are supposed to be our final Big Bads of the series. i'd let arata and makoto fight CBD as their character arc was leading to. i think a lot of gz's problems honestly stemmed from a lack of episodes to tell a fulfilling narrative + the main writer's insane choice to focus og characters within the limited amount of time available + the fact that they switched main writers between nx->gz in the first place; i really think gz could've been good if it was 48 episodes instead of 24. everything was just too rushed and the priorities were misplaced within that limited time.