It is too close after Wimbledon.
Anyway, I think she is being more sensible with her hardcourt schedule this year. Last year was too demanding. All that work after Wimbledon, plus Stanford and WTT. byt the time Stockhom rolled around she was ill, and even so, she would have to leave America and fly across to Europe, then fly back to Toronto for the next week, then back to the New York. It wasnt the best.
This year I think she will stay in US, play WTT, then events like San Diego and LA. Then US Open. Maybe Even Pilot Pen!! Who knows!!!