It's something impossible for me if OTC bevomes DEX.
If you could exchange your crypto assets with other participants between different blockchains directly and trustless what should be the most important for you?
For me, the important is the KYC. There are lot of exchange nowadays or even before that has some problem with KYC, that's why some users are afraid to use centralized exchange, afraid their funds to be locked. Although there can be some reason why some exchange have this, especially in some jurisdiction matters.
But having an exchange without KYC is something amazing and I think DEX can something solve it.