emperior wrote: ↑Mon Dec 02, 2019 5:59 am
Goku too deciding UI doesn’t fit him would make the technique pointless. Especially considering how so far it’s been hyped up as the ultimate thing for Goku to get.
That's one way of looking at it. Here's how I see it: Dragon Ball is the meandering story of Goku seeking greater challenges and strength. I think it would be completely fitting for Goku to give up on the technique when he finally finds mastery within his reach. He seeks personal growth, but he's true to himself. It's why he didn't become Earth's god, and it's why he wouldn't become a God of Destruction. Goku will do what he has to in order to defeat Moro (like how he'll fuse with Vegeta to defeat a villain), but after that, he'll go back to pursuing what he pleases.
Besides, it's not like mastering Migatte no Gokui automatically makes you invincible. It is still limited in various ways by the user. There are potentially other ways for Goku to grow.
emperior wrote: ↑Mon Dec 02, 2019 5:59 am
If they want this arc to be filler, even though it surely doesn’t seem like it is anymore, then they may have Goku only tapping into UI for the fight with Moro due to the training with Merus - but not fully mastering it yet - and Vegeta would learn a gimmick he would only use in this battle alone.
I don't see how this could possibly be a filler arc. The DBS anime filler arcs were a few episodes each and had no lasting character developments. This is just as long as any main arc and is challenging our heroes in new ways. Above all, Toriyama is contributing to it significantly.
Maybe Goku won't master MnG by the end of the arc. That would be fine, but I think this would be a good place to end that arc (that started in RoF).
As for Vegeta, it's already been established that Spirit Control isn't about a single gimmick technique. "Study how the spirit functions and the path will open to you as well."