The current implementation of the Hypershade is retarded slow and cluttered when having even a modest amount of objects and materials in a scene.
Please make it possible to make quick edits to just one material at a time, Softimage XSI style, where you select the object with the material you want to edit, hit a key and instantly(!) the rendertree opens and you can edit the whole shadertree on that object only - no waiting for Hypershade to update all the crap it contains.
Call it a QuickHypershade (QH) or whatever - just please make it faster (much much faster) to work with on an object/material at a time. It would be a nice addition if one could select x number of objects and only have their materials available for editing in the QH.