I would love to see the ability to have palettes of most frequently used components directly accessible.
This would greatly streamline tasks, especially detailing. Rather than constantly clicking "annotate", "component", "properties search", *start typing family name*... one would just be able to grab from either user defined favorite components or a number of user most frequently used components.
Extra points if there can be more than one palette that users can customize for specific tasks. Exterior detailing, model components, electrical, plumbing etc...
Ideally users could define how many components are visible in a palette based on what fits on their screen setup - 20-50 with or without thumbnails. Ability to organize as user sees fit.