Ability to change the order of channel groupings
There are several options now provided for changing the grouping and ordering of channels, but one is conspicuously missing IMO: the ability to change the ordering of the groupings.
In my use of MM, I have a small handful of favorite channels, and then a bunch of other channels, and then a small handful of direct messages. Most of my communication is in the favorite channels and the direct messages, but the former is at the very top and the latter is at the very bottom. It is annoying to have to scroll through the wasteland of all of my non-favorite channels every time I need to switch between the two groupings I actually use.