I think the best for JS is to leave the chain as is and like you say allow Tron wallets to co-exist or access steem! Having atomic swaps will also limit the need for porting the chain over and it will also provide him with additional wallets and transactions on Tron which is what he wants out of This

I think that he has a lot of Technical work to do to provide easier access, to improve the UI to onboard other dapps to support current dapps and to drive steem into more exchanges as well as a burn economy for services on steem