I use a 13″ 2in1 laptop that obviously can be used as a tablet to run Director. It works well, but I also have been using Mixing Station Pro on our Avantis and honestly I like it better. (I used it for years when we had an X32 and it was the one thing I missed when we switched to the Avantis). Plus you have the advantage of the app being available on just about every type of platform. I use an Android tablet for example.
I cannot think of a single function that isn’t available on the Mixing Station app. I actually like using it better for some of the adjustments that Director app forces you to use the “rotary” knob for (gain settings, input number selection, etc). The director software is so sensitive that it is nearly impossible to dial in the right number without minutes of trial and error. With the Mixing Station app I can dial in the number I need much more easily – hitting it on the first attempt nearly every time.
About the only thing I like better on the Director software is dialing in the Dyn8.