Kizaru > Old WB, he clearly had the upper hand during their brief fight. This might not actually be that unpopular since I saw this Kizaru vs WB thread the other day in which most people voted for Kizaru.
Luffy and Boa is a gag and they’ll never actually get together. Partially because Luffy only loves meat and partially because it’s getting into pedophile territory (especially Pre-TS when Luffy was just 17). I know Oda’s best friend is a pedo but he knows better than to put it in his manga.