This eurogamer article was from September 2017, so I don't know if the situation has improved much since then but I doubt it.
I think its more about how bad they are at optimising, than how demanding the game actually is.
So maybe they put more effort into getting it to run on the switch, it might run better there.
However that video they released, Im pretty sure is sub20 fps, and it has micro stutter.
Its probably a early build, but like I said.... no faith at all in ARK developers.
Necro-bump this 2020: http://gamrconnect.vgchartz.com/thread.php?id=229249
Bumb in 2021: http://gamrconnect.vgchartz.com/post.php?id=9047071