Should we separate ERC4337 contracts deployment private key and paymaster server private key?

[eerkaijun]

Currently, we use the same private key specified by users to deploy contracts (if needed) and also as the paymaster signing. Should we separate them?

[norswap]

Context: https://github.com/0xFableOrg/simple-op-stack-rollup/pull/15#discussion_r1328475861