I think there's a really hard line to draw, here.
On one hand, when you get to the big events, you're going to draw the most viewers, so you want to be highly accessible.
On the other hand, it's often only at the big events that we get to see high-level play consistently get stream time -- and I know that I, personally, /want/ to hear the technical breakdown of what's going on when I'm watching high-level play. It's so rare to see it streamed live with English commentary that, when I actually can see it, I want to be able to make the most of it. Beginner-level commentary on finals matches feels like a waste of a good learning experience.