We need to have a way to rename client attachments because otherwise we have to download things that clients send, rename them and them upload them. Its a huge waste of time.
Clients often name attachments they send with random words or numbers and this makes it difficult to figure out what attachments have to do with.
I have a lot of users that would love this capability, especially when associating an attachment to a deal record where it might be documents specific to contracts related to the deal.