This is a very minor niggle, but I find the group command count indicator (I.E. the number of commands within a certain group placed in square brackets after the category name; Provided commands are grouped by category) makes the command list look more visually cluttered, with the group name now being flanked by the arrow icon on the left, and the counter on the right in the exact same font and color.
Personally I wouldn't mind turning it off completely, perhaps from the category context menu, or even a context menu for the command count at the bottom of the window.
If that is not practical, would it be feasible to have the counter be less noticeable?
EDIT: Group counts are less prominent, and can be toggled using the command list context menu, in v1.8.5.6