The tech behind DASH is flawed.

Ever tried to mix a few DASH? It takes hours. Without the "liquidity providers" (weak spot!) it would take days...
Your mixing on centralized masternodes (not anonymous)
Your masternodes are basically making the richer more rich. Fair?
InstantX isn't secure. You need to wait for block confrmations to be sure it won't be reversed.

I'm eagerly waiting for the Evolution paper, so we can all check the claims evan makes...
At the moment, he is pumping vaporware.