Well, you're either bad at math or exaggerating, not convinced it's the latter. Either way it makes your argument look idiotic.
I have a shaman on my 3s. I know how much purge costs. I know how game breaking it is. I know what its like for a Ret Paladin or a resto druid at 2400+ MMR this season, what exactly do you know?
Lets say hypothetically Blizz made dispels cost double what they do now, around 6.5k mana. So 12 casts and the shaman is OOM. What does that change? They will still cripple you with dispels. At some point you will make dispels so expensive that they cant even be used. Im sure some people would love that idea, but thats not balanced either.
Since youre apparently great at PvP, then you should know how some specs/classes are much more vulnerable to dispels than others. Again, isnt the more obvious answer to remove part of that weakness?
So nothing, that's what I figured. Okay, back on topic, it was a nice troll break, but I'm over it.
I don't find defensive dispels to be a problem considering the frequency at which roots and slows are applied, you actually CAN run yourself oom dispelling those. Perhaps an increased mana cost for offensive dispels only.
Well this really says it all. So nerf everyone else but apparently your ability to counter others is fine. No bias here.