Kabal's spin is pretty broken, not as broken as the Disabler in MKT for sure, but the fact that it's a containment, very fast, doesn't activate damage protection, can stop someone in and air keep them there setting up huge damage, etc. Once the spin connects, the player then has to be good enough to capitalize on it, adding the damage. If someone only does uppercuts after the spin, they need to connect 5 spins in one match to win. If anyone connects 5 spins on someone in one match, the playing field is too broad and therefore it doesn't matter how cheap Kabal is.
In my matches with Bill from ECCXI, he connected 7 spins out of 11 attempts on me over the course of 8 matches, something like 20 rounds worth. This is an example of when the threat of Kabal's spin dictates a match when players know how to bait. Not that the spin itself is broken and led anyone to victory, but the fact that it's there and even a one frame disadvantage can cost you 42%+ is enough to make you play cautiously. Versus most other players he would have surely connected 5 times as many and won every match within 50 seconds.
In any event, there are ways to defeat even the cheapest tactics which is why they aren't really cheap. It's the other player's inability that makes them cheap.