imo, this should be accomplished via friendly fork! while back zooko posted on twitter that he believes the zcash community should have a friendly fork once a year (as-long-as the new project is doing something interesting).
want a winning fork? lose transparent addresses, try adding different things the community would like to see (maybe attempt to deploy PoS, etc), and name the new fork zerocash. zerocash/zcash should also be interoperable. would also change economic engine to make zerocash more scarce.