Human decks that go beyond Boros or Selesyna are usually in blue (if not all colors), and dont tend to struggle for card draw
Dragonite doesn't do much in the film, but in terms of HP and attack damage, it is the strongest of the four promotional cards released for the film's theatrical release, including Mewtwo itself, despite its strength shown in the film
Ferris Wheel (eternal) Artifact Attraction Visit Choose target creature that hasn't been phased out with Ferris Wheel
For the Unknown Event cards, your best bet is probably to proxy any that have previously existed, though you might occasionally find a few on the secondary market
Processing time varies based on collection size but usually takes a couple of weeks for bigger shipments
Yes, you should still take it if there's a weak pack, and you'll still want to run itbut you shouldn't prioritize it over other essential pieces for the deck