For a card that is a staple in the best deck in the game (Darkglare) and in the 2nd best deck in the game (Handbuff Paladin), it is very fair to say that it sees a lot of play. Now of course Loatheb is a 'tech' card so if the meta shifts and there are very few Priests and Mozaki Mages, he becomes a prime cut candidate. However I cannot think of a point in time within the last year where Loatheb was not relevant as there are always some very popular meta decks that he can totally shut down (usually Raza Priest, in recent times all these APM mages, in the past also Maly Druid...)
I never said it’s played everywhere but it’s played in plenty of decks. And every single card that sees play in glare has to be good because it competes with many good ones. Also, you stated that neophyte is to bad for wild and I proved you wrong: it’s good enough for the best wild deck (like loatheb) so it’s obviously not too bad for wild.