I have registered in a number of exchanges and find that I miss a simple UI. For some reason Kucoin feels more basic. Don't forget, most of the people involved in crypto aren't wallstreet traders that have the typical trading screens in front of them. It looks & feels normal and smooth.
I definitely like that you only need your email-address to register, because I don't feel comfortable with al the other exchanges to give a copy of your ID, passport, picture or even statements of your address.
Trading fees are a huge income for exchanges. The fact that they share trader-fees shows that they will still gain massive profits but don't keep everything for themselves.
I know, I know, at the moment these fees are but fractions of coins but if Kucoin has more volume, the more trader-fees will be available to divide.
Last but not least:it is clear to me that Kucoin exchange has some kind of connection to Red Pulse, NEO and other Asian tokens. That could come in handy.