Too much drag... Plus, the part of the fin under your toe won't provide and leverage on the down kick. The fin needs to be attached to the whole foot from the ankle forward for maximum leverage. That little hole in the front of Makapus (?) and similar fins is just for drainage.
Dude asks about fin tech and all of a sudden this becomes a pissing match of pedicure tech. Really, it's admirable some of you have beautiful, proportionate, tan grom, highly groomed feet that only a mer-man would have. Keep this crap up though and I'll be writing a pseudo-"well it's been a nice run" post only to punk you braws and recant it seconds later.
Everyone (aside from Clemmy, Bi-State, and a couple others, so not all of "you people") needs to get a few more inches on their comic surfboard so they can step up their game. SI is flatter than the ocean lately. But at least you braddahs got your primped up kicks!!!!!!! Powder on brahs. Powder on.