Special illustration cards seem to replace one of the two reverse-foil cards rather than the rare or holo-rare slot, so you could get lucky and get a special illustration Pokmon ex and a full art Pokmon ex in a single pack (I think?), but the odds would be pretty small, and thats only because the special illustration card replaces a different foil-style card of the 3 foil-style cards
Previous versions played Pyromancer over Fable of the Mirror breaker for quite a while
Im not sure why both cards feature Pidgeys in them as well, but its a nice touch
Wear Away This is a very typical green card
If your opponent really wants your creature gone, they might try to pull something like using a sorcery-speed removal spell or board wipe on it first, only to follow up your Haystack activation with an instant
Based on Japanese community opening data, expect 45 Super Rares per box, roughly 1 Leader Parallel per 6 boxes, 1 SEC Parallel per 67 boxes, and 1 SP (WANTED) card per 12 boxes