Back from the camera shop with a new copy :-) Viewfinder mach now with output. Still have under exposured blacks in certain situations. Did some tests: In normal light conditions exposure match great with gay chart (all blacks open) and output is very nice. In low light and high contrast the blacks are still a bit under exposured. When over exposure to compensate that, highlight will be blown out in these situations.
I still prefer to use raw and compensate as much as possible in LR, but it's hard to recover highlights. I think that's why the camera under exposure in situations with a lot of contrast.
The sensor isn't that good as my Sony (A7r II), it has limitations. The Sony blows the Fuji away in DR in all light situations. But i like the Fuji. It's in my bag every day.