I'm not sure how I feel about lowering the Switch resolution to 720P for certain games to get that perfect scaling to 1440P. Seems kind of a pain to stay on top of. But out of curiosity I will try it with Astral Chain to see the difference. I will say this though, with Mario Kart, which is 1080P 60 FPS, it cleans up the image really nice and looks amazing on my LG OLED. Zelda, which is 900P? Cleaned up super nice as well. What I'm getting at is I don't think resolution switching will really be an issue for the most part. Maybe if you are super fussy? From my experience so far, just leaving the Switch alone and letting the mClassic do it's thing seems to be just fine.
Oh, and on a side note. I thought it was strange that this device came with no instructions whatsoever. I had to find a Youtube video to answer my questions on setup. Not that big of a deal I guess, but it would have been nice to know what each switch postion on the mClassic did and also if I could use it directly from the Switch dock instead of in my TV. It turns out you can so it worked out.
Some tips with the Switch.
** DO NOT use the HDMI cable that comes with the Switch. Use a higher bandwidth rated cable that can do 1440p or 4k. The Switch HDMI cable is a basic 1080P rated cable.
** The mClassic can be plugged directly into the Switch dock with the dongle accessory that comes with it. Keep in mind that it also needs to be powered with the included micro USB cable. Fortunately the Switch dock has USB ports to accommodate just fine.
Looking forward to seeing your test images! Fun times!!