Yeah, this looks way better than YSVIII. I was one of those who couldn't play it on Switch because of the performance and the weird shimmer on grass. Full screen on my 65 inch TV the trailer looks great. Devs are getting better at porting.
Ys 8 was ported by what appeared to be the Disgaea team internally at NIS. Fair to say they're not the most experienced with 3D games. I reviewed it on Switch and watched comparison vids and saw that shadows took a big hit, and the framerate and dynamic res was spotty to say the least.
Engine have had loads of experience with Switch (and prior Nintendo systems) ports both big and small.
On their site you can see they did Little Nightmares on Switch, Into the Breach, RIVE, and Blossom Tales among others on Switch indie-wise as well.
It's a shame Caligula was a bit rough but that might've been due to factors including timing to get all versions out in the west at the same time, or maybe because they did the PC port at the same time as well (one of the few not done by NIS's Entertainment Support studio). Maybe FuRyu/Historia's code was just a mess despite it being in UE4, who the fuck knows.