Interesting point about the Rosetta integration. I wrote about it a year or so back. Not only would a Rosetta integration make it possible for us to be listed on a CeX like Coinbase, it would allow seamless interoperability between blockchains, in that it'd make transactions deployment from an interface outside the ecosystem completely possible.
Presently, though. I think its purpose for now is to just get listed on Coinbase. Who knows, maybe we'll find it useful when we get friendly with other chains.
Interesting! Great avenues to explore in the future. Interoperability can help a blockchain immensely.