This sounds interesting and I'll give it a go, much of which will be agreeing with the above.
Fillet: I like swapping Quick Foot for Quick Time.
Ox: I like the idea of switching Tough Skin with Stand Firm(Sturdy).
Princess: Either Hobble or Follow Up to harry models.
Truffles: Make Hog Wild a character trait.
Boar: Seems fine, so the 2KD on the sixth column sounds good.
Boiler: Possibly too much, but Get Over Here[Princess].
Brisket: A reliable dodge, probably 1< on first column.
vBrisket: I rarely find myself using it on other models so changing to Acrobatic sounds good.
vGutter: I have yet to put her on the table, but Grapple Hook being able to target friendly or enemy models seems much more interesting.
Meathook: Seems fine to me, possibly lose Sanguine Pool?
vOx: I've never been able to get much if any work out of him so I'll leave this to others.
Shank: I know the game states only one change per player, but I could see him becoming better at ball handling or fighting. If ball handling, change KICK to 2/8"(not any more accurate, but better at getting the ball where it needs to go). If fighting, a trait to go after returning players such as "And Stay Down: This model gains [+1] damage to Playbook damage results against players at or below their Icy Sponge level".
Tenderiser: Definitely feels like he needs a rework. For a different idea give him Poised while within 4" of the friendly goal-post. It still won't stop a lot of strikers getting goals, but does make it a bit more tricky to bounce off of.