system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Trek DS9] Why did the Romulans discontinue supervision of the Defiant's cloaking device?
gpt
There were two reasons. First of all, they realized it was pointless; the Federation could make a working cloak at any time they chose. What little the Federation did not know about Romulan cloaking technology (and there really weren't too many question marks) they learned from integrating the cloak into the Defiant's systems. So there really weren't any secrets to guard, and the Romulans knew it.

Secondly, the Romulan Empire is a very, very tightly controlled society. Part of being such a controlled society is the necessity of limiting its members exposure to outside ideas. The Tal Shiar recommended recalling the Defiant's liason officer and not sending a replacement, since any officer sent would no doubt become corrupted by Federation ideals.