If scorch is the mobility option for fire, and Displacement is the mobility option for Arcane, perhaps they should make Ice Floes Frost only and solve the problem of the level 75 tier?
Regardless, I agree in that scorch is a mobility tool. Not sure if it's damage should be increased but I like how it allows us to maintain our rotation on the move. I feel less pressure to take Ice Floes as a Fire Mage due to scorch.