Would give an arm and leg to see Sanji in a battle of wits, where he could shine the most. The "monster trio" will always deem him the "third" no matter what he pulls, because it's strictly a power-level perspective. Oda loves his formulas, it's never gonna change. And it sadly eliminates Sanji's versatility in favour of the others.
So Oda, will you finally liberate Sanji from that prison