I think one of the biggest barriers for PIVX (and other Altcoins), is that it is not convenient to directly trade FIAT/PIVX, and having to go through a gatekeeper like BTC or ETH, limits mainstream adoption. The next coup for network adoption would be to have a major retailer of needs, like a grocery chain, accept PIV. Any increase in merchant acceptance of PIV is good though. This is most important in the evolution of PIVX from being a speculative investment to the world's best currency. Tl;dr zDEX sounds like good news!