+1 that "unstuck" is exploitable. However giving you a free teleport home is also exploitable. Can it be engineered to not allow you to pass through barriers? Perhaps it might be enough to teleport you five meters straight up, not straight forward? It appears getting stuck in terrain usually involves getting your avatar trapped "under" terrain features.
In most other games where such solution is needed (pretty much any game that has no hearthstone equivalent), unstuck teleports the user to his home area or to some completely random spot that isn't hostile.
"most other games" have Fast Travel and other magic teleports, this game is both unique and neato that it doesn't.
I don't know what it does now, but if it ported you randomly in a random direction and has a cooldown, that would limit it's use as a infiltration or annoying combat tactic.