I think you will be very pleasantly surprised at how easy to use, and beneficial Genie+ is in action. My 2 cents of free advice, from someone who loved FP+ and planning, and has used Genie plus now on 3 occasions, once in a large group (10) once on a solo trip, and during very busy periods (both around Christmas and 4th of July weekend).
Don't try to fit the Genie+ square peg into the FP+ round hole. They are different systems, with different functions, Genie+ is built to skip lines, NOT to pre-plan your day. You get the best use of Genie+ when you are looking for what ride can I get on next, not, I have to get on a certain ride at a certain time.
If you are staying on property, make sure you take advantage of early access. In the old FP world, early magic hours were limited to 1 park a day. While it is true that its only 30min now, it's across the board at all parks. The crowds are more diffused than they were in the past and you are going to get 1 major ride, or 2-3 less popular rides at really low wait times in that first 30min.
Use your 7AM Genie Plus for the RIDE you can't miss. If there is one thing you need to get on otherwise your day is ruined, use your 7AM Genie plus selection on that one. Once you can make your second selection, either because its 2 hours after park opening or you had an early Genie plus selection to start, find the rides you like with the next available open slot. Remember as soon as you scan into your genie plus ride you can select another ride. Don't be wedded to an order, take the next one available and ride the wave from selection to selection. Not only is this the way to get the most out of the system, but it also limits your time on the phone. Don't be sitting there waiting until a certain ride is available at the exact time you want.
Tie up your walking shoes. I loved FP. I loved pre-planning every detail of my trip that i could as far out as possible. Hell the time we took my inlaws to WDW, I made sure our FP selections were planned in sequence to limit the amount of walking we did between rides. That is not possible if you are optimizing Genie+. You may go from Buzz lightyear, to pirates, to under the sea, to haunted mansion. Efficiency in getting on rides, will not equal efficiency in getting to the rides.