It is indeed a miss opportunity by Oda, I mean what's the point of hyping the SN to be the ones who will replace the Yonkos but in the end its just their captain that is relevant to the story (aside of Killer and Zoro ofc)? At this point how can we imagine that Heat and wire could compete against the likes of the calamaties or the sweet commander for example? Hence i cant even imagine them beating a tobbi roppo...
Hopefully we would at least see Bepo in some real action, tho i will keep my expectations very low..