LETS US NOT FORGET
that there are some reprecussions to imu setting foot in lower world that the elders were worried about.
imu is not an absolute being thats true but his powers might have some connection with the holy land mary geoise.
there is also a posibility that imu needs to recover for a long time after this arc cuz he stepped out. so it would make perfect sense for strawhats and luffy to barely survive this and then imu becomes dormant for some time whc=ich gives a decent enough time for the following -
1. Zoro controlling colour of the conquerors
2. sanji also gaining conquerors
3. Ussop reawakening his observation haki from back then
4.Shanks's crew helping starhat learn the truth / shank's crew against starhat grand fleet cuz of what happened to barto
