In Audition 2.0, one could left-drag out a selection in Edit View and while holding the LMB down could hit the space bar and Play the selection and still DYNAMICALLY change the selection while playing. This much used, loved, and needed 'feature' is missing in 3.0. One CANNOT play a selection while the LMB is down! One has to release it, Then play. This, of course, Breaks the dynamic editing of the selection using a Single mouse-drag action to adjust the "in point" of where one would like to apply an edit (delete, filter, etc).
PLEASE hear us! Bring this Workflow back, either at the least as a Pref Option in a 3.xx patch update.