User blog comment:B214/Volume 22 spoilers/@comment-95.90.227.198-20170204105622/@comment-1359322-20170206171809

The end result of that would be another Bleach or FT, a total mess. Not even worth considering. Why do you think Ishibumi went with a Rating Game arc instead of introducing newer OP villains? Look at Bleach. Kubo added more and more OP villain and how did it turn out?

Randomly creating OP villains and randomly giving power ups is poor writing. It won't help the story much and can ruin the story easily if done poorly.