Protobelt failed to address mobility creep against immobile mages....
instead, all it did was add more mobility to champs that were already mobile. The actual dash is pitiful and the main function of the active is to stick to target and add more burst damage.
The item doesn't appeal to immobile champs. It has low AP, and the active is kinda hard to use if you are not in melee range.
We need a real solution for immobile mages that can't be abused by mobile ones. sorta like how some items are only ranged or melee.