It would be most useful to be able to move the green scrubbing arrow manually as one can do in QuickTime. As others have said this would be in keeping with most other audio editing apps also. It would be fantastic if as the scrubber is moved one could hear the audio it is passing over. This would enable a user to pin-point exactly a particular sound or note.
This page is really for extended discussions of particular feature requests which will take up too much space on the Feature Requests page itself; or for discussions about how to improve the Feature Requests page itself. If you are wanting to make a Feature Request please go to the Feature Requests page and see if the feature is already asked for. If the request already exists, please add 1 vote to its vote count, or add your request if it does not already exist. I added your vote for scrubbing to the existing requests for it.