The ring does cause the wearer to Leap by a small chance and only if they're being hit. Plus you can't control where you leap, it all depends on your position. In addition, a breaker sinx will want to get to the emp as fast as possible, and pvp sinx will be missing a belt, and won't have the same DPS on you if they want to use the ring to leap. It'd be annoying sometimes, but after all, all classes can wear it.
So on the whole, the ring shouldn't have a large bearing on whether or not Leap is reinstated. Though it's something to think about.
On the other hand, I remember the tournament on FeelRO, and how this one TK took about 10 seconds to leap back into the emp room after we killed him. That's extremely fast. And given that TK's now have a weapon which could make them a formidable breaker, the added speed might not be smart to add.
But the damage with a geared TK vs. an emp vs. a breaker sinx damage hasn't been officially tested. We'd need to do that first before deciding.