I'm completely fine with it. Luigi's mansion was way easier to port to the 3ds using the dark moon engine, so Nintendo went for the low-hanging fruit to pad out the 3DS library a bit more.
Keep in mind Switch owners, we will get something more than just a port of the original.......which will be Luigi's Mansion 3.
Bet with Intrinsic:
The Switch will outsell 3DS (based on VGchartz numbers), according to me, while Intrinsic thinks the opposite will hold true. One month avatar control for the loser's avatar.