I agree with the "Scrubby Values" request and have entered it as a "Feature Request". It is much faster than using arrow keys, typing a value or selecting from the pull-down menu.
I have never gotten used to the dynamic zoom feature in PS. In AI CC 2014 I can "Cmd-Opt-drag" to zoom to a specific area. I like that. Or I can "Opt-Cmd-Spacebar-Scroll Button" to zoom in or out. I don't find that as useful because it is not very smooth or accurate as the "drag-zoom" method.