I think, though I may be wrong, that this isn't a rant about pyroblast as it is blue having the majority of the best mechanics in the game (draw and counterspell). Colorless has gotten a boost with Eldrazi, and Shops is always going to do broken stuff, but this seems to lament that there's not more color diversity (which I've always disliked). Back in the Old School days, you could run any colors and have an equal chance. As more sets came out, the "best" color kept concentrating more and more to blue to the point where there is so much redundancy in card drawing spells and counterspells (and FoW really shattered the mold being free) there's not much reason to play other colors beyond a splash.
What I'd LOVE to see is R/G/W/B get a pitch counterspell. If they all had a "FoW", you'd likely see all kinds of colored decks coming out. The only reason you see few colors beside blue is because Vintage is the format of turn 1 broken, and you can only stop that with FoW.