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The MTF for the 50MP and the 35/2 sure back that opinion up. The 40 lpmm lines hug each other and stay over 70% out to 15mm image height, with most of that near 80% - and it does that with ultra high macro contrast (high 10 lpmm). For MTF haters, the English text for that is: this is serious resolution territory. The MPs are the stellar lenses in the ZN line, for these 'traditional' uses, and they are both a good leap forward from the the Contax days.
The 35/2 chart, does give up a stop in the chart so can be expected to improve a little from f4, but it gives a still very good meander around the 60% line. I see better in the lighter, more flexible 35-70/3.4 at 35mm/f8, the aperture at which landscapes are generally best shot. Horses for courses, the ZN35/2 is no nag, but there are better options for this rather specific application.