The Lightning-type meta needed a big threat, and Jolteon EX is a mighty fine addition
Seismitoad lost a lot of its power and was never a tier 0 deck again
Dragonkin Berserker I think this card is eminently playable, he makes dragons, which costs 5, but since he reduces the coast of boast abilities by 1 for every dragon you control this could easily get nuts, especially in a set with a bunch of changelings
The opening of the Multiverse has been a boon to the Atiin culture's traveling practice
As for the two stompy boys, we have Territorial Scythecat and Ulamogs Crusher
You can start at the Mega Tokyo centre, soak in the immersive experience, and then hop between the independent shops, comparing stock and prices without the navigational challenge of Akihabara