Excel 2013 actually has changed from Excel 2010.
Of all the 100 excel features everybody needs 3-4 - but each needs a different one, so you have to cover all of it to be an acceptable replacement. The original post is one example of such feature that apparently is 'must have' for someone. Database/sql integration for someone else. Solver functionality for yet other people. And so on.
Excel is a moving target. Nothing is ever going to "replace" Excel by simply chasing after it and trying to do everything Excel does in the way most comfortable to existing Excel users. Anything that's going to succeed as an Excel replacement will do enough of what Excel does in a way convenient to existing users and offer some compelling features that Excel doesn't have.
And there are always going to be people complaining about any replacement not mimicking some feature in the way they'd most prefer; even after a replacement succeeds -- it happened with WordPerfect users complaining about Word long after Word displaced WordPerfect and acheived dominance.