More excels and more improvements to debugging excel please (:
The real super power to excel is you can see the data as it flows through the cells. Whenever I see a visual programming tool that is just a way to write a regular script by linking up a DAG I can't help but feel like they missed the point. Motivated non-programmers have been using COUNTIF, VLOOKUP and such since forever. They're not incapable of writing a textual program 1 statement at a time, it's just that most programming environments don't facilitate it.
In this spirit excel would be way easier to debug if you could easily show the value of subexpressions in complex formulas