Pre-populate certain fields
Under the contacts > forms > options there is an option to pre-populate fields with known values. As this is helpful in many ways, we encountered many times that the "message" textarea field also gets pre-populated with the same content as before. This could be a problem when you use the pre-populate function on a contact page for example.
My suggestion for a new feature is that you can pre-populate certain fields, or at least disable pre-populating for certain input/textarea fields instead of all. I think this function would not only benefit us, but a lot of companies that use the pre-populating feature across their forms.