Hi,
I'm having the same "problem" with my SL2, magnifying to 100% I get a noisy/blurry image. I tried it in daylight at f1.4, at 60fps and 120fps, etc..... And I get the same result... although it is functional in the sense that you can actually focus but the image quality in the EVF noticeable inferior for example to the Sony A7r3 when you magnify at 100%.
Of course when you are not zooming/magnifying the image in the EVF is far superior in the SL2 compared to the Sony A7r3.
Anyway, I'm posting here just to see if there is anyone here that did try the SL2S and SL2 and made a comparison between both EVF while zooming/ magnifying because I remember reading in a Leica press note something about "improved image quality in the EVF while zooming".