I think that Binance DEX is a hybrid exchange. I think that its not very bad that Binance Dex works on a centralized blockchain. Its important that Binance continue to be a good conscientious exchange.
DEX is not an hybrid exchange site but the developer still has the full control over the exchange site dude. But this party can be trusted and it's not a big problem as long as the team can still become the trusted guys.