Conquer haki depends on person's spirit. And luffy has stronger spirit than late shirohige. Because of this shirohige can't use haki from that distance and also he can't use it on admirals and vice admirals.
Definitely that was a crossover I think.
Shirohige and aces death was necessary. But overpowering kurohige is a very unnecessary. That bastard is now invincible.
Giants of elbaf
Yes trump hates akinu and usopp
No he's with zoro in wano.
I don't know man. What's going on man? Is big mom came and beat the crap out of luffy? It's so confusing and complicated.