That is like people back didn't like awakening, many people dislike the idea of awakening now it is a part in almost every battle discussion.
I know the whole time travel shit can be dangerous asf, many mangaka fail to explain these better. But if this is the real Oden(I believe so) then we should give Oda the chance to explain why we have now Oden in the raid.
Overall if he has a good explatiation, then we could be okay overall.
I remember how many people dislike chapter 970, saying Kaido vs Oden was to short with never seeing both true power. This all can be forgetten if Oden vs Kaido round2 could start in act4.