I have 0 problems with the performance, it's hugely overblown. It has frame pacing issues, but a lot of other games have them, and this isn't the worst example. The menu transitions seems laggy but I think it's intentional. Resolution is on par with most Switch games.
I really don't know what all the ruckus is about.
Also, it's funny that the DF review compares SMTV to DQXIS since I think the latter performs much worse in terms of visuals. The framerate is stable, but the resolution is pretty bad, models close to the camera look very blurry and it has the worst pop in I've ever seen in any game. I still think it's a good port, but it bothered me a lot more than SMTV.