Love the deck.I had a similar theory in mind, except with Black.I used Guttersnipe and Young Pyromancer to leverage the red/black sorcery/instants.

My deck was a little more burn/destruction oriented with the black rather than the counter with blue. I really like your idea though! Guttersnipe is awesome and very underrated. Spellheart Chimera is beast for this deck. Good choice!

What problems does your deck typically have? How does to fair against agro, control, and midrange.

I've found my deck, Apocalypse Meow, hard to deal with midrange. I absolutely destroy agro decks and control is tough but I have a good record against them.