Scene Explorer in 3ds Max has great functionality and flexibility. I love how its window can be switched to different Modes like Layer Explorer and Light Explorer reducing the number of extra floating windows. There are other great tools in Max with lots of potential also called explorers and that are still not directly accessible from the same dialog. Material, Crease, Boolean Explorers etc. should be integrated into it and improved upon.
One particular that needs attention in the light of the new Boolean modifier is the now abandoned Boolean Explorer. When the operands list got crowded with the previous Boolean and Shape Boolean, the Boolean Explorer was pretty handy as a unified control system. With regular geometry Booleans you could add the column with the open subdiv iteration and change the level of iteration from the same place. Plus, with the Shape Booleans it could also displayed Seam Type and Seam Length and you could adjust them from there. I find this pretty important in the light of the splines being supported by the new modifier in the future unless the operands list or other controls in the modifier UI could remediate that. See Eloy vid at 1:30 and 7:00 (link)!