Custom character sheets are a great idea but the current implementation currently requires some HTML & CSS knowledge which presents high barrier for entry. In order to simplify the process for the average user we should have an intuitive tool - a drag and drop character sheet editor with the ability to edit fields, add/remove rows and reorder layouts would be really valuable. A user would start with the default Roll20 character sheet (or whichever is most up to date and available) and can then drag & drop additional/different pre-built GUI elements, rearrange and resize elements (either with manual or automatic resizing), have options to edit all fields and tables, and add/remove table rows. This would provide an excellent user interface while vastly simplifying the user experience and value proposition of the Pro tier.