So the JUSD has been introduced because by the time of writting the WP, and planning the project, only USDT existed. There were no DAI, USDC, or Rockz (my favorite so far).
Now that they solution exist, it is very strategic for us to use their solution:
> it will save us money
> it will increase the awereness of Jarvis among the community of these stable coin
> it will match our philosophy: partnering instead of competing
Rockz has all the feature we wanted for JUSD, and even more!
I agree that Rockz looks promising but it seems that this "bulletproof" crypto currency is still at the ICO stage. I can also mention the TUSD (TrueUSD) ERC20-token pegged to the US dollar.
Since Jarvis aggregates different markets, in my opinion, it can be used as a tool for arbitrage trading. This feature could be profitable.
Rockz is still in ICO stage I am not sure on what terms it because favorite.