hm, you do bring up a good point i didn't even think of; crackle is the only wild card LOL. But, it's a dual edged sword; i do find crackle very very good in this deck; it needs the extension, and i have 3 cards to negate overload, and with trogg, and it really helps with things like deathlords, it's almost essential to fight through cheated out early high health minions like that.
so theoretically i could drop crackles, pick up lava burst and a hex, and go standard
BUT that comes with the caveat; i'm winning in wild, wild has very diverse decks you face, so people are playing lots of homebrew decks. making those drops and going standard, might not make the deck much weaker, but will sort of filter out my opponents to more refined meta decks that might actually be harder to beat despite the deck arguably just moving sideways and not losing much between formats
a very interesting dilemma i don't think i've ever really run into yet despite maining wild since the split.
shredder would be an 'upgrade' but i'm trying to be as lean on minions as i can to fight to drop yogg and have more madness occur lol. the synergy with the ones i have is pretty damn good, boom for a faceless could arguably be better but honestly i find more often throwing faceless down early and/or getting overload for trogg is more valuable, or just as valuable as BBs (plus man i play boom in enough decks lol)
edit: altho legit crackle is one of the most powerful 2 mana burn spells this game has ever seen IMO, immensely moreso in a deck that includes massive amounts of spell power opportunities and troggs.