I am not sure in what way this is planned, but an active replay system is so necessary. 1. helps people learn 2. enjoyable to view when not in the mood to actually play 3. good tools for teaching people 4. good for marking issues that can be fixed, in terms of OP units etc 5. just plain awesome etc
livereplay would be nice. maybe even with the option to broadcast the delyed, so it is not possible to cheat with them.