Seems fine for the initial proposal, still there might be things that are better on paper than in practice.
Could you elaborate more on the cross chain liquidity feature? What is the risk of exposing all networks liquidity to the failure of one?
I specially dislike the concept of my collateral switching to GHO in high leverage positions, to the point of departing from the protocol if its implemented and forced. Switching ETH for GHO will liquidate ETH correlated positions. In the end it just means your collateral is only an illusion inside of AAVE, adds complexity to an already stressful task.