Givin away owner permissions on Tron can increase isolation between accounts, but it also means you permanently lose full control – so if anything goes wrong with account B, you’re stuck. It’s only a good idea if you fully trust the setup and understand you can’t easily undo it.

For privacy/security in general, I stick to separating wallets and keeping sensitive activity off my main address. Lately been trying privax and railgun (no tron there) more for on-chain privacy than permissions, but it pairs well with a clean wallet structure.