I just wanted to say what Chadmann said about map specifics is a great point. This is something players up to grandmasters even won't notice little things on a map such as on MLG tda i believ it is that has the low ground between the main and the 3rd so reapers and blink stalkers can go into the main another way.
Correct me if I am wrong, but I believe that little ramp thing is removed from the Blizzard Version of TDA
Casters making sure they are paying attention to the game. There were a few times when the main caster was on another screen typing something for quite a lenghty period with the camera sitting in FoW, while the co-caster was still calling action.
Also, if the situation arises if someone is solo casting, they need to keep the casting going, or at least keep talking about something. A few times (especially early game) there were long quiet periods which were a bit awkward.
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