Basically i am curious as to whether you really NEED to sumo squat if you are also regularly performing single leg movments (bulgarian SS, single leg squats.)
I know that you are going to get better glute medius activation when performing unsupported single leg movements as opposed to a bi-pedal sumo squat , but what about the adductors ?
Like Caveman said, if the exercise is practical in your set-up, properly hits the targeted muscle, and allows you to be able to progress on that exercise than yeah, keep it.
Plus, there’s like a million variations to single-leg work. I have NEVER done single-leg stuff with the intention of working the hamstring; rather, it’s always TUT for quads or something to that effect.
I also think there’s an article that was done about which exercises are the most efficient at targeting the glutes and hams but I don’t have time to look for it.
Soreness doesn’t necessarily mean that you’re getting the most bang for your buck. I’m not saying that the back squat isn’t awesome just that soreness doesn’t mean anything. I squat thrice weekly and never get doms unless I take a lay off (which is why I don’t).
What is a sumo squat? I thought you said sumo dead because that’s ingrained in me. What’s your goal? Does the single leg work or sumo squats help you accomplish that goal?