Why is there so much hostility/dislike towards Renewal?

[Snowhawk]

I like the item thing >.> Hate the monster thing as I already have enough issues training as is. And how would the insta cast be affected if they are only separating the damage functions of cards from weapons. I can understand how cards like Hydra and Skeleton Archer would be affected because they add additional damage, but cards like Hill Wind wouldn't really be affected because it already had nothing to do with the weapon. A card giving insta-cast wouldn't be affected by this either, not in anyway that I can see at least given the info I've seen here.