One of the major pluses of bitcoin is the public ledger(blockchain). This change in the logistics of bitcoin transactions would honestly just make bitcoin more of a shit-show than it already is becoming; not to mention, bitcoin already has regulation issues and for those of you who wish to make bitcoin more legitimate in the eyes of law and common folk, this is definitely not the way to do it; on top of that many people want bitcoin to become legitimate but also be out of the hands of the government. Unless a bank, or some government agency (which they currently can because of the nature of the blockchain) can see the transactions, its gonna be pretty much a no go.