The undocked performance and quality should have been compared with other mobile options.
According to "LowSpecGamer" that game wouldn't even run on many UltraBooks, because many of them aren't Vulkan compatible. And his performance boost by removing shadows looks very ugly:
On the other hand, with the right settings it looks better on the GPD Win 2 than on the undocked Switch due to the higher resolution:
If the Switch version had some optional FX to turn off in favor of the resolution, it could help many issues.