Implementing eSign: Signature Cards/Resolution

We are on the verge of implementing eSign for our branches for maintenance tasks in addition to account opening and lending. I think this will help with some customers who tend to change signers rather frequently, such as with closers on settlement agents' accounts. I'm beginning to consider whether collecting their signatures on Resolutions adds value, or whether an authorization from the principals in the Resolution is sufficient? I am also considering whether we can use a separate authorized signer list with signatures as an appendix, rather than re-creating a signature card every time there is a signer added or deleted. Am I behind the times?