It could be simply down to logistical or strategic shifts from the Pokmon Company and McDonald's due to the expected high demand for the overwhelmingly popular release
Scry 2 (Look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)
Also, the power creep has accelerated a lot and in current meta, you have huge 300+ HP VMAX Pokemon that hit very fast and very hard so often if you miss your setup in the first two turns, you may be out of the game already
I would contend vla1ne's statement that "(i mean, it's still using normal monsters to do said things, so it's not likely to be very OP either way.)" Were it any other vanilla-lovin' Archetype, I'd agree wholeheartedly-well, besides Metalfoes but I digress, they're their own issue-but this Deck has some decent options in the otherwise released "C"s
The fact that this guy only costs 1 tribute to summon makes him a worthwhile addition to any Winged Beast deck
Thanks to the release of Photon Sabre Tiger, it's gotten a lot faster, but not too much more consistent