Yeah. By EOS, the Strawhats as a whole will be monsters. Just think. As Pirate King, Luffy will have to be a minimum of Yonko level (Whitebeard/Shanks), Zoro will have to be stronger than Mihawk (probably will have casual slashes akin to Law's technique only via raw power), Sanji will be Kizaru as you said, just maybe slower with fire based melee instead of light, Franky will either be the next Vegapunk or the next Kuma, Brook and Robin and maybe even Chopper will probably gain haki at some point and I can see Robin pulling a Naruto with dozens of haki/chakra infused clones, and Chopper having Monster point with haki :o, as well as ridiculous medical expertise, Usopp and Nami are harder to think of. They will be the weakest but not weak by the end. They all have immense potential.