I mean, first it's not really fun to be on the receiving end.
Secondly, it just flips a card to the other side without even any disadvantage, unlike for example Harland Mindlock that just has to leave play to make the creature switch, and has to select a flank creature, not just any creature. Same for Smiling Ruth, his conditions to capture are much harsher (too harsh IMO btw).
IMO, it feels just too good to just drop it on any creature you like. It should at least stun/damage/exhaust the creature that switched sides.
I also ahve the same issue with Sneklifter, except that it has the disadvantage of needing the opponent to have an artefact... But at the same time cards that destroy artefacts are very rare, and the card is regarded Shadows! if it's not one from your houses. That's just unbeleivable IMO.
These two cards have a problem of balance.