Low-hanging fruit:

1. Too much info in Hierarchy panel. Either start with all branches collapsed, or add a 'Collapse All' button, to save doing it by hand over and over again. Oft-requested feature.
2. Too much info in Hierarchy panel. Add a checkbox to hide IK Chains.
3. Material Room: add Copy, Paste, Paste All buttons to the UI to replace that silly little top corner arrow menu.

Thanks, Epi