Kind of a weird reason to revive this poor, dead thread, but I finally got to play the Switch version. We played some splitscreen co-op.
I'm actually really surprised by how bad the performance was. I watched the Digital Foundry video and still wasn't prepared. Playing a bot match in split screen, even in docked mode, makes the game look like it's running at less than 480p and the framerate still tanks. Playing online is better since the system isn't doing any AI calculations, but many maps seem to run poorly as well.
I haven't tried it without splitscreen yet. I assume the performance hits closer to the 60fps that they claim it runs at, but splitscreen doesn't really come close even when it drops the resolution really far down.