trade speed will be the critical problem that will prevent any DEX from seeing high volume, especially in the future.
I've spent quite a lot of time looking at ways to achieve high frequency trading (HFT) that is both secure and reliable
high volume and high frequency are two things. You could attract users to make infrequent large trade and get high daily volume. B&C allows user to trade between their own wallets and can potentially attract high value traders to trade often.