If rETH is to function as a close representation of ETH, it is prudent to retain attendent utility such as the capability to interact with lending protocols.
For this reason I have initiated an application for MakerDAO to consider rETH as a collateral option on their platform. They require the submissions as a ‘Maker Improvement Proposal’ (MIP6) which you can see at the below link:
rETH collateral application for integration with Maker (MIP6)
Please feel free to let me know what if any changes should be made to the application.