Onboarding for high-frequency trading firms: KYC/KYB challenges

We've been seeing an increased scrutiny on the KYB side for prop trading firms, especially those engaging in high-frequency strategies across multiple jurisdictions. The sheer volume of transactions and the rapid capital movements often trigger AML red flags that require significant back-office resources to clear. What are others experiencing in terms of the initial onboarding burden, particularly when dealing with non-standard legal structures or beneficial ownership that might not fit neatly into traditional templates?