Like others, I found that Lightroom 4.3 caused chroma smearing on my Fuji X-E1 files. I compared 90 shots I did today processed with Fuji SilkyPix RAW converted and LR 4.4RC. It appeared to me that the chroma smearing problem is solved. I did not see the chroma smearing, even at 3:1 zoom. The .tiff files from SilkyPix and the .dng files from LR, appeared practically identical which was not the case with LR 4.3.
There was some discussion of purple fringing with the X-E1 and the Fuji 18-55 on this forum. I did not see this in my backlit shots today. I believe that the problem can be greatly reduced or eliminated by avoiding over exposure in the camera. I have found when faced with very bright skies and darker foregrounds that I get better results by metering the sky, and then over exposing only 1 to 1-1/2 stops. If I cannot do this, I get good results by properly exposing the subject. If both the sky and the subject are over exposed, the fringing appears around the subject.
I was also happy to see that my files are no longer coming into Lightroom cropped.
It looks like I will be able to use Lightroom for my Fuji files with the 4.4RC.