I think the reason the "new" format being bw-on is for consistency. It basically becomes an unlimited format without the need for house rules with regards to pokepowers/pokebodies/abilities
I think this is an incredibly hard list to make, as including a stage 2 line and a bunch of tech cards makes for a crazily tight list. I like the idea of latios but with more decks running enhanced hammers to counter plasma basics, running a lot of special energy in order to charge her up...