I think it actually will open up new possibilites. If I understand correctly, PtW can be done as a turned based option as well as the more standard who has the fastest mouse approach. I would think there would be plenty of people interested in new types of SGs that would be there for us all based on turned based MP.
1) Two (or more) team SGs. One person from each team takes turns completing multi-turn sets. The results can be posted either after each turn (pretty intense) or at the end of the set. There would need to be three treads for this approach, one for the "dipolmacy" between teams and one for each team. The AI run cvis would be the wild cards, and the game could very well turn on who can line them up against the other.
2) Single person teams, but each one does a set number of rounds and then posts results in a thread for them. This one could really be fun for those who like to compare build orders and play styles.
These are just two new ones off of the top of my head. I am sure more variations well come out. I for one would love to see the changes. It might even bring in some new people, and even bring back some of the old and forgotten.