The raw files are indeed not playing nice with Adobe. Whether this is a problem pretty much depends on what you are planning to shoot, and how much your workflow depends on Lightroom. Any kind of foilage and grass tend to generate artifacts. The more you sharpen, the more those will be visible, but they are there even when sharpening is set to very low. Keeping the "Detail" slider to a minimum helps, too. (Funny thing, Petrus seems to have the opposite approach.) I have noticed artifacts even in areas with very little detail, but they tend not to be a problem. Color bleed has not been an issue for me, but then this might be due to the kind of photos I have taken. Silkypix does a much much better job and is not as horrible as people make it out to be.
My thought would be that if for some reason you need to stay entirely within an Adobe-centric workflow, and you want to use the camera for backpacking (foilage), the X-E1 is not a good choice at the moment (as much as I like the camera and lenses). This will change if/when Adobe updated their raw engine. If you are not wedded to Lightroom, the X-E1 is a very nice camera.