After sorting through a bunch of junk about making an Excel wish list, here are some pages about suggested Excel improvements:
https://www.thespreadsheetguru.com/blog/excel-weaknesses-a-w...
https://answers.microsoft.com/en-us/msoffice/forum/all/excel...
A previous company I worked at made YouTube videos for content marketing purposes. For some reason that no one could explain by the time I started there, the first couple videos in the account were random, basic Excel tutorials. Nothing fancy. Just things like using the Cell Formatting dropdown or doing a VLOOKUP.
Those videos were 5+ years old by the time I left. And in their worst week, a single one of those Excel videos got more views than the entire view count of every non-Excel video combined. It was crazy.
Edit: I should've read giarc's comment below! We're essentially saying the same thing.