I wouldn’t want a new type. I think the chart is pretty well-balanced now. Arguably by Gen V Dragons were nearly in check anyway given there were more new Steel-types, but from what I understand they were still strong after the introduction of Fairy, it was just in Gen VIII’s competitive meta where Zacian ran wild that they seemed to vanish. Presumably in Gen IX they’ll be able to pull their weight (before factoring in the chaos of Tera, of course).