Personally, I don't really like them, but I sense that more people like them than don't. I'm fine with just putting up with them and being in the minority (as I do on PS4), since they don't bother me too much.
I won't be too surprised if they get added; MyNintendo's implementation on mobile always seemed to point to this being a thing on Switch. I'm actually pretty surprised that it wasn't there at launch, but given how the OS and online experience still seem to be growing their feature set, I suppose I shouldn't be. This launching with the next big update (early 2018 with the paid online/VC games?) would make sense to me.
If Nintendo can give me Platinum coins to redeem for discounts, then these achievements might be worth it. I'd also really like for Nintendo to let me unlock little digital figurines, stickers, themes, etc. based on the games, kind of taking a page from Smash's trophy gallery mode.