I don't think reviving the characters is 100% bad but the worst part is the newer characters since they don't fit into the theme of the story and are very generic or downright cringe(looking at you Mizuha )
also the introduction of those characters made the revived characters get sidelined
also all the conflicts are cringe especially that pedo brother
even the main character of this arc is cringe aka Mizuha who killed her non abusive mother for shit and giggles (yes people can be upset when they are stressed but under no circumstance should they kill their relatives or friends)
I was thinking the same thing. I liked how it was going, the way march sat by fushi's leg as he spread his roots all over earth and when 'peace' was finally established. The school arc really kinda ruined it for me too.
The new arc just ain't good so here is my SPOILER WARNING now.
First off the whole story is about fushi learning what it means to be human and to have human relationships. We can see this in the earlier arcs where he views march as his mother and how he comes to see gugu as his big brother. The next arc was him learning what it means to have friends and so on. The story should lead and continue this storyline to the point where he does find someone he likes and to have kids and deal with loss that way. I thought thats where they were leading the manga with Kahaku but they went for a more convoluted storyline instead with the revival of old characters.
Why I feel this new arc hurts to read is because it essentially ruins the older arcs by bringing back characters from the past. Fashion should be allowed to morn all those who have passed and move forward with his life you know, like a normal person would. Instead they bring back literally every important person in his life all the while adding a whole bunch of new characters. Why have gugu there? What point is there in the story for him to be around? This kid who fushi views as his brother is so not involved with the story he might as well not be there and this can be said for all of them. The sacrifices of these characters are basically voided out by letting them continue to live.
Also whatever the fuck they are doing with that little kid & the knocker as well as man in black is just so weird and out of place.
Anyways thats why I feel it sucks and if I had to guess it probably isn't the creators fault but possible editor influence. They probably wanted the series to be much longer than it is when they were planning to end it sooner than it is going to.