Another issue with the drop-down UI: I need to caution new users not to click the X on the right of a selection. They typically think that will just clear the filter selection, then are frustrated to find it's been removed from the list. For a list of more than 5 items, the user needs to scroll up t...

Currently, each segment in Analytics is stand-alone. You can only pick one at a time in each set, and picking one in a superset does not remove excluded subsegments in a subset, allowing the user to select mutually incompatible segment combinations, resulting in no data. They should instead work lik...