My suggestions:
1. Eliminate unnecessary plug-ins list refresh. For example if you press VST Configuration -> Options, even if you only look at it and press cancel, all plug-ins list will update and redraw, and it wastes much time. Really VERY annoying.
2. Functional folders in custom layouts. I always use custom plug-ins layout, and there is big problem when new plug-ins are installed. I have to change layout to default to try it, or to go to the plug-in manager, find new plug-ins (difficult), add it to my layout. I'd like to be able to add to my layouts functional folders:
a) Folder that shows the whole default plug-ins layout inside itself
b) Folder that shows all plug-ins that are not included in current layout
c) Folder that shows all new plug-ins (by some criteria, for last month, or 6 month, or something else)