These two exchanges are the most popular now, I used both but lately I'm using ForkDelta if I try to buy some cheap tokens.
There is nothing to improve in the interface as simple is better, but the security has to be improve.
They are both trash and they will be forgotten once Binance Dex has started. When I was a new user in EtherDelta, I was very confused on everything like it's interface is for professional IT staff only to understand. It was slow also and you just keep refreshing whether your order is set or not. I am certain that the Binance DEX will never have those issues.
I can't wait to use the Binance DEX because I'd like to dump my shit coins, if they would allow. LOL.
Maybe it will be the solution for project that are longing to get listed and get some decent volume as this one might be free or with less fee.