For me this is key - the commentary should exist to keep you updated about useful knowledge that otherwise is hard to get across purely visually- changing light, weather, and the current state of the score. Also about the attributes of the bowler/batsman to help the player understand how best to use them. If you actually listen to commentary, especially in cricket, that's what it is there for. And there's absolutely no reason why it shouldn't be there: it is seen by some as cosmetic, but it's so much more important.