1. Option to remove scroll bars from screen. Just about everyone by now should have a mouse that has a middle scroll button that can be used for panning, not to mention more screen real estate.
2. Ability to undock the options bar. More screen space.
3. When sorting views in R6.0 using the Browser Organisation, when a Group By type isn't relevant, it shows up as ???. It'd be nice when it can't determine the type, it should just omit that level of grouping and move onto the next grouping option.