It's not quite the same, but you can set a keyboard shortcut for audio gain. Then it's just; click on clip, hit shortcut, type 1 (or -1) and hit enter. I find it much easier and more nuanced than pulling audio lines or having to go into the clip menu. It works for groups of clips too.
Simon...that's a helpful tip. Thank you very much.
In CC there are some new shortcuts for "Clip Volume" ... finally!
They go by either 1db or 6db increments. I'd prefer 3db, but, better than nothing.
UPDATE: Actually, in Preferences>Audio, you can change the "Large Volume Adjustment." Yay!