Hey, Truco from Yeti Finance on Avalanche here 
Interested in how the facilitator role would work, for instance a system like Yeti Finance could be used to mint GHO against ERC-4626 or other vault standards for something like delta neutral strategies, which we have been developing on our own anyway. This would remove the need to produce fragmented liquidity for individual stablecoins across ecosystems when deploying on another chain like Ethereum mainnet since GHO liquidity would already exist. The Yeti model takes inspiration on stability mechanisms from Liquity, and could be a way to introduce GHO minting against high yielding assets.
We already take aToken v3 on Avalanche as collateral to mint YUSD, excited to explore potential collaborations with GHO.