Funnels should be improved to show popular paths without manually define them. (See Mixpanel) Event parameter slicing improvements.
Might be the best free analytics service. Consumption of parametrized analytics. It is now difficult to get top behaviors presented in an easy-to-grasp fashion. One needs to dive into individual parameters while loosing context with others. It is also tedious to choose parameters from long pop up lists. UI could be more compact with less white space all around and resurface meaningful info instead. (A graph with 2 bars need not occupy half of the screen, as an example.)