Hmmmm... I wonder, why did Luffy not activate the Conqueror's Haki to get rid of all the bystanders? I can sort of understand why not using Gear 4th before measuring the power of Dogtooth properly though, the backlash is too big, so he has to be sure he'll win if he uses it, specially in a place with no allies like the mirror world. I'm looking more forward to how they'll stop Big Mom though, things are looking pretty bad! >.<