What does main focus even mean? It's not like the Wii/DS/3DS where the input/displays were completely different and the graphics weren't anywhere near as powerful as the other systems on the market. The Switch is a lot closer to the current consoles and it's just a HD handheld that can output to the TV.With how well Switch is selling in Japan currently and if its momentum keeps continuing I wouldn't be surprised if the Switch becomes their main focus.
And its not like Japan cares about power either.
All they have to do is scale down the PC/PS4 version to get it to run on Switch.