1a2Z3c4k I know how to do it, I just refuse to use it. The only way to defend it is not even try to get close to your opponent, even then you can't leave a single little gap because your defender just won't keep up with acceleration. Certain players like Bale and Henry though, are just completely broken when using it.
I don't mind secondary contain, as it's rare that the AI actually tackles while using it. It's more to apply pressure, or so you can switch and tackle yourself. However, I do mind auto tackles because people jusr run into you and let the AI do the work. With squad battles I don't mind the length, they do still feel a bit long to me sometimes but that's mainly when I'm grinding through for the weekly challenge. That's why I just started doing all my squad battles after it refreshes.