Scaling Liquidity & Multi-Broker Connectivity

We're in a growth phase and evaluating our existing liquidity providers and broker connections. Specifically, I'm curious about the practical challenges and solutions some of you have found when trying to onboard multiple tier-1 institutional brokers for improved execution and depth. Has anyone hit a wall with API integration complexities or unexpected latency when running multiple feeds concurrently? We're optimizing for $EURUSD and $XAUUSD execution and exploring options beyond our current single-provider setup.