Idk what you are arguing about Resto shaman needed nerfs and honestly did not get enough of them.
The tremor change honestly is good. Allows warlocks to CC players on a shamans team and a shaman has a 1 min AoE trinket for fear, not bad.
Except the problem is that Fear is the only CC that lets damage rarely break it. Tremor held that in check on top of the old talents that reduced Fear duration time.
Locks are a fire n forget class. They don't need to actively cast to continue to do damage once they get their dots up, so they can focus on throwing CC everywhere. All the other classes with spammable CC have to choose between CC and damage.
We'll have to see the full effects with the full updated patch notes, but it just seems like it could be the start of a slippery slope.