What kind of blockchain analysis could one reasonably expect with this scheme? It seems to make regular blockchain analysis just from looking at the blockchain close to impossible, but what about someone that monitors the network in real time? Couldn't you make the connection between inputs and outputs before they get into a block?
Unfortunately it would probably be reasonable to expect that every unmerged transaction was visible to surveillance companies (although CT does still protect the amounts). Although I'm sure services would pop up that take in transactions, merge them, then publicize them after merging (and it'd be so easy to set up such a service that they wouldn't all be in cahoots or NSA-controlled).