I mostly agree with michaels on the above.
Whether Piling On needed a change or not the one they came up with is silly and I think makes it a skill that willl never be taken, removing it from the game.. I have seen other ideas that are decent: can only be taken on Big Guys (old version rule?), make it similar to a foul so a certain die roll gets the PO player sent off, or to the KO box, PO player has to roll armor, make fouling more effective, etc. The removal of the skill hurts a lot of other teams more than the CPOMB Chaos and Nurgle; those teams already have the ability to remove players without Piling On. It does hurt teams like Humans, Dwarves, Norse, Amazon, etc that need to remove players to stay competitive but now lose a major tool from the toolbox.
As far as Claw goes I don't get too worked up, but I rarely play at very high TV even online, can't see it being a huge issue in this league. Also I have Werewolves.
I like Human Catchers as AV8 instead of cheaper but not enough to get worked up over it.
Wizards are a must have, especially if we are going to be adding new fresh teams to a league with teams that have already played a season.
As a Necro coach I love the new MVP rule, no SPP on Zombies!!
I do't know enough about any of the rest to really comment, though the rebuying of players would need to be carefully balanced. I've heard you get extra money for wins, TDs, Cas; if you aren't careful the strong teams could stay strong while weaker/newer teams might suffer. Again don't know enough details to know for sure though.
My opinion on the cards is exactly the same as michaels, he hit every concern I have almost word for word.