For me NSS is more like a back to basics playstyle, watch your spacing, poke here and there and punish. It makes Yoshi simple to use and I actually play a little more defensively but I enjoy throwing random mix-ups a lot more. I find it's also a good playstyle reset after many games cause sometimes I get carried away with risky ideas. I also use it when I'm just not having any luck with my shenanigans. This way I just calm down and focus on playing a solid game rather than worrying about what set-up I think I can land next.
My favorite set-up is actually super simple. Just randomly NSS, then step in and 1+4 lol