I'm mostly irked over the fact Hasbro caved at all, while everypony else was going "We like this portrayal of Derpy, even if Tabitha St. Germaine kinda messed up the voice, but that's okay."
This really is why we can't have nice things... maybe this upcoming episode with Fluttershy will help. Especially if they get R. Lee Ermey to do Iron Will's voice. Or, failing that, The Rock.