DEX should be much more dark net oriented, much more distributed, like onion layer, with no central server functions, no name, no address, no clear net, no business. These DEX will become inherently illegal because they don't follow FATF rejection of 'identity associated non custodial wallet'.
The current generation of DEX are still highly trust-based and dependent on centralized infrastructure. Order books and atomic order matching use centralized servers. The centralized DNS is often integral. With platforms like Binance DEX and CryptoBridge, you are trading proxy assets while you trust someone else to hold your real assets.
What we need is truly decentralized ways of trading. We need much faster ways to relay order book and order matching information P2P. We need decentralized internet like P2P mesh networking, decentralized domain registration, atomic swaps that are usable for traders in real time. This won't happen overnight.