At the subaccount level, it would be helpful to have the ability to grant/block access to either specific contact fields or field folders.
For example, you have sales people selling product A, sales people that sell product B, fulfillment reps for product A, reps for product B, and admin that oversee both products. Product A reps don't need access to see fields used for product B and visa versa but the admins need to see both.
In this scenario we could house Product A specific fields in a folder granting access to Product A reps, do the same for Product B, and grant access to both folders to the admins.
Currently we are handling this by having 2 subaccounts but there are certain times where contacts cross over and that makes it difficult on the admins to keep track of all the products and financial information.