MITB matches were already cool when they used to belong to WM. When they decided to split it to a whole PPV, they killed the whole concept. And then, two briefcases for the two major titles, which was stupid imo.
And creating MITB cases for Tag Team and Mid Card titles... idk if that would be the smartest move. I think they should just stick to one briefcase, for the major title. And that's it.