Ability to rename the default fields
There are 3 fields: firstname, lastname, email. It were very useful if I can rename them.
In my subscription forms I use only the firstname field as name field, so the the label firstname is confusing to the users, because it can contains only the firstname but the whole name, too. Depending what the user enters.
So it were nice, if the label of this field is changeable. I know that I can change this in the forms but not on the subscription manage form.