I found it extremely funny that the bad guy got his limbs destroyed, took control of MC to heal them, and then immediately got them blown back off again.
Even among all power of friendship moves written about since the dawn of civilization, this is the most boring and anticlimatic one ever created. It's almost silly.
I agree, and that's because
we don't know these people. Like sure yeah MC's a hunk of wet cardboard we've been over that, but I don't think we know a single thing about any of these spirits other than they used to be MC's friends back before he reincarnated. We don't get anything about what kind of people they were, how being a spirit has changed their perspective on things,
anything to feel some sorta emotional attachment. Even in the "present" they haven't done anything, each one basically just says "thanks for saving me, I missed you so much" and then give MC a slap on the ass to rescue the next one.
It's like if Legend of Zelda Ocarina of Time only consisted of the "adult" Link sections. You adventure around saving the Seven Sages, but without the "child" Link sections as context they're basically just a bunch of random strangers who say they knew you in the past and you only use their power to make a rainbow bridge and beat up Ganondorf.