That seems to be the trend from what I can see. It's all 'why the sprixie princess' or 'why nabbit' or 'why rosalina'. If being a key character in a key game doesn't earn you a spot in future spinoffs, what does? I don't recall any complaints like this when Yoshi was added to SMK's roster but I swear if that happened today people would be like 'wtf that's too sudden you can't have yoshi in like one or two games and then treat him like he's just as important a character as luigi or toad'
tfw you're about to hit 'post' even though you're not sure you've made every point you've wanted to make or not phrased it clearly or
tfw you're about to hit 'post' even though you're not sure you've made every point you've wanted to make or not phrased it clearly or