Simple one, but one which would be extremely useful!
Currently, when you hover over a node name, the COMMANDS options which show up within the hover panel does not have a link to one of the real strengths of Orion, then Perfromance Analyzer. Having this option would make it much easier to get to this awesome visualisation of key metrics 
Also, if you were to select more than one node in Manage Nodes/Manage Elements, having an option to go to PerfStack for the selected nodes in the More Actions/More drop-down in the top of the table would give a shortcut to users to compare key metrics for those nodes.