Bleach: The Thousand Year Blood War

[Psyren]

They are defined by their relationship to Ichigo

To quote Chidi Anagonye from The Good Place: "Okay, but that's worse. You do get how that's worse, right?"

The entire selling point that was Ichigo's powers were not gone forever, just inaccessible without outside help. Fullbring was just a stepping stone.

No one expected the main character's powers to be gone forever. Did you also think Superman would stay dead in Death of Superman?

But they could have had Ichigo win with his brains for once instead of just getting repowered suddenly and the typical shonen battle at the end, which was such a boring fight and foregone conclusion that even the in-universe spectators didn't stick around to watch it. When even the characters fighting for their lives don't care, why should I?

Like here's a crazy idea, the Fullbring version of his powers could have been something completely different than a sword, and the arc is about our Swordy McSwordguy hero learning to use that. After all, Fullbring powers can quite literally be anything (e.g. Dollhouse Girl or Video Game Kid). Or if we must indulge Kubo's obsession with all things sword, let his fullbring be TWO swords, whoa this rollercoaster of creativity might actually be a little too wild, never mind let's slow things down a bit.