Hmmm to be honest? I think it's necessary to change New Super Mario Bros, I mean the concept has been the same since the DS, but it just won't go in my head how such a probably more easy to produce game is ported. For me who had a Wii U taking 50 or 60€ for the same Game just now with characters to make it easier is more than lazy.
I just don't think a port was necessary and that's more of a sign of lazyness.
I feel the same about Mario Kart 8 Deluxe.
It's such a great game and I played it for about 80 hours. But yeah... If there won't be a successors, I'll be disappointed.
I agree with the points you made as well on Mario Party although it breaks my heart... I hope we get another one but more like MP 1-8.
Yeah let's see some Skyward Sword