yes, i'd rather have a built-in evf (like Fuji, not a lump like the GH-2) - if there's room for a flash, maybe they'll replace the flash with evf on the EP-4
other than that, there's not much to complain about. Olympus has resisted the Megapixel wars if favor of a sensor with as much resolution as any lens can match and decent high ISO performance (from the DP Review samples looks like it's at least a stop better than Panasonic although not as good as NEX or Fuji). in fact the overall performance - IQ, noise, autofocus, continuous shooting meet or beat my old 20D with the addition of liveview, video, and a screen that you can see. a pocketable camera that can deliver quality 13x17 prints of most subjects under most conditions
i've been excited about mirrorless cameras and 4/3 format concept, but until now much less impressed with the reality
i have an s90, and am willing to insure i have bigger pockets for the EP-3 available if it means i can photograph moving subjects and other than in broad daylight
now that Panasonic and Olympus have demonstrated fast CD autofucus maybe there's hope for point and shoot cameras and a generation of photographers will learn that people don't always have to pose and say cheese