I'm in the same boat. Using 7.1. I can work on building/editing my site for about two hours before everything slows to a crawl. I've done everything suggested by the support agents. It has to be a client issue? Server? It has to be something on their end. I just logged out, shut everything down, and started again the next day, when everything was fine for a few hours - then the lags began again. So frustrating as I really want to like this system. I don't know how to escalate the issues to someone higher up in the food chain. Sigh.....