Last I heard, only around 3 or 4 teams have signed so far. That was a couple of weeks ago though, so it may have changed since then. Hopefully very soon for the rest
I think there should be a rule with autographs that the signature is left unobstructed! The autograph should always be the focal part of the card on an auto card.
After all the issues TLA has had with pens over the years, that doesn't look too great either - maybe he had signed a fair few before hand. Not that this will make it into packs with the dog-ears.