What's being proposed here seems to require line of sight. Yes there'd be some cases where it would bypass barriers (e.g. barred cells where you can see inside, or portcullises (portculli?), or narrow chasms where you can see across) but you wouldn't be able to use it to blip through a wall or door so some of those issues go away.
A corner case that'd need a ruling would be where you can see your target arrival point but there's an invisible barrier such as a wall of force in the way. (personally I'd allow it unless the invisible barrier was actually
at your intended arrival point, in which case things could get messy

)
Another corner case that'd inevitably arise would be what happens if someone tries to arrive on a moving surface e.g. the deck of a ship, the back of a horse or other large animal, or the branch of a tree swaying in the wind. (personally I'd advise that the PC would know this is risky then if they still want to try it, they're at risk)
EDIT TO ADD: another consideration is whether the teleporter can carry someone else. If yes then breaking people out of jail becomes a triviality; that alone would be enough to make me rule no.