Ultimate's base newcomers are as good as you can hope for when you seemingly only dedicate enough time/resources/priority to five new original movesets. Taking into account that Sakurai basically has his hands tied with Pokemon, it having a slot and that slot being promotional being seemingly non-negotiable. So really, eleven newcomers, six non-echoes, five original movesets, and of those, four that weren't mandated.
Though I imagine if Sakurai said he wasn't intending to include Inkling Nintendo would've sent over the executive with glasses.
Obviously I think they chose well, but you also have to weigh that against the fact that the additions were quite limited.