What does it even matter if someone like Rey/Eddie are not "credible"? Eddie beating Lesnar is a memorable moment and there is nothing wrong with creating moments like that. Fans BELIEVED in that moment, as evident by how they cheer. Credibility doesn't matter as much as you think in wrestling
Nevermind that:
1) Roman has always been booked as weak without the Bloodline (he is not booked like Lesnar)
2) There isn't much of a credibility difference between Sami and Cody, especially when Cody was injured for a majority of this run. People acting like Sami is some glorified jobber as if this entire story isnt about him (and Jey) realizing they're much bigger than underlings for Roman
How is Sami just "instant gratification", as if this story doesnt reach all the way back to his NXT career and Roman getting betrayed by Seth