I was there last week. It was fairly busy but not unmanageable. We purchased G+ for MK and I got my moneys worth. We rode pretty everything but JC and the spinners.
As far as the other parks, we would just go later in the evening and get everything done. We did smugglers as a single rider walk on and Rise was about a 30 minute wait before close. We took advantage of Test Track and Everest's SR lines as well riding multiple times. Flight of Passage was a 48 min wait before close the night we did it. Epcot waits weren't bad either. If you don't have little ones and and stay out a little late, save your money.