Combine values for collapsed applications
As displayed in the image: For applications with one process the total amount of memory/cpu usage is on the right side. For applications with multiple processes this is done for each subprocess (until there is no more space).
I think this looks a bit cluttered (especially for Chrome in this case), it would be much clearer if all these subprocesses would be added together to one value that is used for the application group. Since all separate values van be viewed when the application group is expanded this doesn't remove any information.