SF Debris once pointed out that the whole treaty's conditions were never revealed, and for all we know, the Federation got other concessions. While it's a credible theory, the issue is that in the episode it was first established in, Picard's biggest issue with Admiral Maxwell experimenting with cloaking technology is that it's supposedly kept them at peace for decades... when the Romulans are the most recurring enemy faction in all of TNG, even more than the Borg or Q. This was during the middle of the seventh season, after several encounters with he Romulans.
One of the most unintentionally funny moments in all of TNG is how the first season finale hyped up the official return of the Romulans, and all it amounts to is...
"Hey, did you destroy our outposts?"
"No. Did you destroy ours?"
"No. You wanna work together to find out who did?"
"Sure. This doesn't mean we're friends though."
"Okay, have a nice day."