Sorry if my post was unclear. I'll explain it more fully.
The park hopping strategy with the FP+ system would be to tour the first park immediately after opening before the lines get too long using the Standby lines. Lines typically are shortest for the first hour or two after opening. Then, hop over to the second park in the afternoon, if you have later FP+ selections for that park.
For example, be at DHS for rope drop, use the Standby lines for TSM, RnRC, TOT, and STII. Depending on your pace, you could be done with these by 11 AM. (I've done them even faster.) If you want, then watch one of the DHS shows (which handle lots of people), perhaps have lunch, and then hop over to Epcot where, hopefully, you have afternoon or early evening FP+ selections for either TT or Soarin'.
The key is to be able to get "good" FP+ return times for popular attractions. However, attraction capacity suggests getting "good" FP+ return times for popular attractions might be difficult.
Note that I use "good" in quotes because different people will have different definitions of what constitutes "good" FP+ experience return windows. Like FP, it appears FP+ will provide guests with a return window of about 1 hour.