Enable creation of custom groups within the Home Tab of the Ribbon. Allow users to remove certain icons and groups from the ribbon. This is available in Excel, and my Home tab is highly customized so that 95% of the icons I use are available in one place.
I'm always flipping between the Modeling tab to format a measure, and then back to the Home tab to enter Query Editor.
There are some icons that I've never used, and would like to replace them with more often used functions.
Why not allow both to be on the same tab?