Onboarding new prop traders: KYC/AML overhead vs. quick scaling

We're expanding our prop desk and facing the age-old dilemma: how much friction can we reasonably add to the onboarding process without losing good talent? Specifically, I'm talking about the KYC/AML burden for international traders. It feels like we're constantly caught between regulatory compliance and the need to scale quickly. What's the sweet spot you've found for data collection and verification that satisfies regulators without scaring off viable candidates? Are there any less cumbersome but still robust solutions for identity verification you've implemented for non-US traders that don't involve a stack of physical documents?