I would say it looks good enough to be a next gen exclusive title and the director of the game seems to implicate a hardware limitation with the Switch as well to run the game, the game has some of the more geometrically complex scenes of this generation ... (MHW definitely doesn't look like a game that's possible on last generation systems)
A game doesn't need to be 1080p/60fps on PS4 like we see with a bunch of last gen ports or cross gen games on PS4 but I've yet to see the Switch being able to run a ground built up current gen exclusive 30fps game for HD twins ...
I can imagine that most 30fps games that are built solely for current gen leave the Switch out of the picture ...
It's not like he could say that Sony paid them a hefty sum of money to develop the game lol.
"The strong do what they can and the weak suffer what they must" - Thoukydides