Lots of interesting Excel functions are in the works focused on text processing for quick analysis and reporting.
Support for Excel Functions is limited to recent versions of office, and Document Properties APIs are limited to specific versions of Word and Excel. We will work to extend support to as many client's as possible, including web and Mobile.
Most of today's UI elements are implemented with high contrast and limited "help" bubbles. We will make add-ins easier on the eyes, and easier to quickly understand.