Honestly with Meerus and possibly Whis getting involved those bunch of other arcs with Goku and Vegeta training was a gotdamn waste of timeThey've each learned how to tap into new techniques and mastered them and it means jackshyt cause they can't kill the villain with them
Vegeta's ability is still a threat, which is why he said he won't make the mistake of taking it again. He can still be undone by Fission.
Goku's UI going to the next level would also pose a significant threat. Assuming Meerus buys enough time for healing, it's a very real possibility.
Characters with unusual abilities or techniques would actually shine here because it's not something Moro can immediately shrug off, like brute force. You saw it this Chapter with Gohan's trapping technique, which left him vulnerable because it caught him off guard.
Roshi did the same in the ToP, something out of the box would be nice.