Also, please be aware that there may be schedule changes between now and August, especially related to the MCO-PHL flight. If the schedule changes to below MCT or by a large amount, you'll be able to make changes to the booking to something that may be more comfortable to you. If that happens, I would suggest considering moving to MCO-MIA-LHR for less time on a domestic flight/longer time on the transatlantic flight, plus better lounges at MIA vs. PHL, but that's personal preference.