I'd love to see a per service speed limit, so that lower priority ones don't go over their hourly/daily limit, or cut down on unlimited accounts total speed.
Also, the ability to right click on a file and pause all from the same service when one chokes and all of them start erroring out. Menu button too.
Finally, it wasn't specifically listed in the sticky, but an auto growing password list with each new one entered for auto extraction.
Great work! You make life so much gooder.