Interesting topic which I am following, I guess as its been said we all have our own priorities concerning camera performance, sensors can end up making you paranoid as seen on some other forums.
I currently have and old 10 mp Olympus E-510 with the rather good F/2.8 14-54 zoom, a A-37 with kit lens, a A-6000 with no lens as I use my A mount lenses via adaptor, but no IBIS which is a pain and E mount APS-C lenses are a bone of contention for me, and a Olympus OM-D EM-10 with just one lens, a Panasonic 12-32. System wise both Nikon ( and I like the D5300 because its small and light and DX is enough for me ) and the M/4/3 are the best systems to buy into IMHO. I also think Sony A mount has a far better system choice at reasonable prices as compared to E mount
I just shoot land and river scapes, air plane museums, classic car and bike rallies and other such stationary subjects. So I need a sharp pictures that reveal good detail and pleasing colour, My old Oly 510 wins every time. followed by the EM10, both Sony cameras especially in Jpeg are not as pleasing for colours, yet are supposed to have the best sensors out there. Its how the sensor is used and here I think Nikon gets the best out of a Sony sensor followed by Olympus. They all have there ups and downs and there is no perfect camera but some are better than others but that's subjective depending on what area of performance is important to you, mine Is sharpness and colour followed by DR
As for Fuji, it went all down hill for me after they abandoned EXR.
Bottom line, its a dilemma to which system to spend the money on and which to let go.