Had the opportunity yesterday to give an acquaintance's X-E1 a spin with some of my RF lenses. To sum up: I really liked the experience and so have ordered an X-E1 for myself. Manual focusing was easier than I expected--pretty much the same as with the OMD5--and should further improve with the upcoming focus peaking implementation. The camera felt good in my hands and handled fine with the aux. grip. RAW conversion via Iridient Developer looked pretty darn good. Lightroom conversion was fine tonally but lacked some spatial bite compared to Iridient.
Now I just need to get out from under SE Michigan's crap weather (early this morning the F'in heat came on, fer cryinoutloud!) and give this rig a good workout.