Just want to point out that item 2 is being addressed in the D.U.C.K initiative, recently approved for funding by LEGO. It will be a knowledge base of risks, mitigating measures and overall best practices collected from the operators in the Curated set. Really a cool initiative, will be interesting to see the initial release.
- Create some checklist, best practices to work with nodes, Web3signer etc (those that is usually cause slashing on Ethereum) or work closer with both old and new validators to ensure everything goes smoothly