I don't know, the exchange market is getting really flooded right now.
My experience with Coss is different than yours.
I found their exchange slow, unresponsive, full of bugs, and not easy to use.
I see that they are rolling out updates to make it smoother, but it's not what I would call steady progression.
I suppose someday, they will be able to handle to volume and technical side, but why wait when there are so many other better exchanges out there?
Instead, I see Bibox as being the next big exchange.
It already has insane amounts of volume and is particularly popular amongst the asian crowd.
Like kucoin, they are known for listing some relatively harder to find coins.
As it starts to get more attention from western traders, it will blow up even more.
Yes, they need to update the excahgne ste better. I don't feel convinient trading at coss because the interface. I prefer to trade at livecoin or hitbtc. However the withdrawal fee almost all excahnger is so high, is there any exchanger with low fee of withdrawal.