You forgot the most infuential (and unscrupulous) crypto exchange in the cyptocoin ecosystem: Bitfinex. https://medium.com/@bitfinexed/latest
If counterparty risk is a top concern (and it probably should be) then don't trade on unlicensed exchanges... That rule is great to follow and I haven't even gotten into any usdt tether issues...
However, the ones I have looked at / tested so far just aren't ready for primetime. Slow transaction times, lackluster user experience, no liquidity.
But those are all problems that are to be expected for what are basically beta-status projects (at best) and I am excited to see where things go from here.