The whole structure of Wano was a bit weird with 2 big villains. That probably was already a twist taking BM to Wano (and indeed she played her double -amnesia role) so that Law and Kidd had work to do too and the arc resembled (at least in Oda plans) in a miniature Marineford arc with plenty of big shots fighting. The best result of this was the rooftop fight but now that Kidd had no longer a use and is just an unwanted surplus in the PK race Oda cut him out. Now I want to see what happens to Law. He will not be this brutal again (Oda make him suffer also because of excessive cockiness, same as Ace) but something important has to happen either way (or simply BB wins but Law escapes without any big damage, BB gets the road poneglyphs and maybe Law preserves a copy too, so he somewhat stays in the race, for now, unlike Kidd).