Three things that would be amazing for the styles panels (we use a lot of styles, so managing them better would be a huge boon):

1) Snap the current folder you're in to the top of the panel once it scrolls out of view, so it's easy to close the folder you're in once you're done.

2) Include some way of viewing the "based on" hierarchy all at once rather than having to go into a style's properties to see what's contingent on what.

3) Have labelling and filtering as per photoshop's layers panel - so you can find and organise similarly named/labelled styles quickly, without having to remember the names using the (admittedly superb) Quick Apply. Having the ability to show just the styles with non-default settings for a given group of attributes too would be even better.