If you run the druids as Feral, both bears and cats have Berserk which is 15 seconds (20 glyphed) of fear immunity.
Berserk can even be used while feared, to break it.
Combine that with the 2 minute trinket, and diminishing returns on the 3rd fear directed your way...
The Resto/Boomkin just have the trinkets.
But then, look at the premiere pvp team currently... DK + 4x Ret.
They're losing defensive (friendly) dispels on Ret/Prot specs.
So they'll be in exactly the same boat.
Connect With Us