No, I'm a huge fan of regular squats. But I'll throw in OH Squats here and there for various reasons. One might be to deload from regular squatting. Regular squats involve heavy weight and pushing more and more weight week after week, especially once your strength levels reach a certain level, is counterproductive.
With that in mind, deloading with a similar exercise that uses less weight such as OH Squats, Front Squats or even lighter Back Squats is called for.
Or, as mentioned above, the OH squat requires a lot of mobility. Having someone perform one is a great way to dissect muscle balance and joint health/mechanics. So in a big way, it can be used as a diagnostic tool.