I've been mostly using my X-E1's on-board RAW processing rather than any external software. This produces a JPEG, of course, but with care one that requires little additional post work.
Other software, like Iridient Developer, C1 & even Aperture seem to do a better job with the X sensors than Lightroom/ACR, but IMO no-one has yet really got
it. Given the unique color filter matrix I expect it'll just take further work by the various third parties...
I've recently re-processed some of my 10-year-old Canon 10D RAWs with current software. Yow! In quite a few cases the improvements in both spatial detail and tonal gradation are significant. Sure wish I could retroactively upgrade photos shot on now fading 1970s-era E6 to the latest & greatest.