I really think something as significant as sleep should warrant a suspect test on principle, and I definitely take issue with Yawn being included on this list. If I'm not mistaken, the problem identified with the meta was specifically fast sleepers like Darkrai being oppressive. Hence, even if we take it as read that re-banning Darkrai is not a sufficient solution to that problem when things like Hypnosis Iron Valiant are running around, banning Yawn is completely off base and needlessly punishing slower mons. Dire Claw and Relic Song being exceptions makes this choice particularly bizarre.
Personally I would advocate for not banning Spore either, as its distribution keeps it comfortably in check and its 100% accuracy minimises uncompetitive randomness on a handful of slow mons, though that may be deemed splitting hairs.