For the record, the Jump spell triples characters' jump distances. So Astarion jumping 11m is reasonable for a 'normal' jump distance of a few meters, if we treat this as the tadpole permanently casting the jump spell on us. As previous posters have stated, this is not that powerful since Jump is a 1st level spell.
Personally, I find it more significant that jumping "acts as a disengage" as Swen states in that video. This will be huge for squishy characters who want to leave melee without wasting their action! Disengage via jump, move further away, then cast a spell/fire a bow from a safe distance.
