ender view tools, starting with a past-render buffer with right and left select buttons. A pair of A/B assign buttons so that I can do a simple toggle between any two pictures. Also add a magnify button so I can do a quick A/B check between two arbitrary ZOOMED images in the buffer queue. And of course delete keys to clean up the buffer. Oh yeah, an auto-crop button so I don't have to live with the huge black zone in my crop renders.
-Rotate handles on everything in the 3D view.
-More noise functions in the shaders. (at least voronoi)
-Node macros (keep clips trees inside a single box)
-Full 3D preview, ie an option button to render the view in all directions. It would take longer of course and I wouldn't be able to move but I WOULD be able to spin in any direction immediately. I'm mostly doing skybox work so checking my entire pano view is a very common function.