Jayce is no longer viable... Mana was an issue before with him (though manageable), now you've increased the cost of his escape/chase mechanism, and destroyed a couple of his best combo's (the damage his hammer brings). I've never thought of Jayce as OP, having played against him and as him, but whatever. I've shut people down with him and been shut down, just like any other champ. His skill level is just at such a level that many people can't play him and when they get pwned by someone with the skill level to play him and don't know how to counter him they QQ. Same with Lee Sin.