I am not so convinced Tibor, if played as one, is that weak, maybe players still need to find out that deck, after all its only been 1 week since the patch.
Also, it WONT be me to explore it, because i hate Tibor, mill, and ball / poison, which is probably the deck where tibor makes sense, with philippe and those status giving servants or whatever.
Regarding Vilgefortz Renegade, i agree that the main concept should be stealing a good card from opponents GY, not putting one in for practitioners to copy. Still, i dont like your suggestion only because i am ok when Vilgefortz is used to put a bronze in GY - the most famous case of that is putting a NG knight, for illusionists to copy, although with vrygheff's rework that deck took quite a hit, but still, i dont want those decks around a bronze to die.