Genie+ only spits out the next available, just like paper FP worked....
The problem with this system is the same problem they had with paper FP (low capacity and few rides so they sell out early)
for eg. in Epcot,
When Genie+ opens next month, Remy and TT will be paid FP (or whatever it's called) and NOT part of Genie+.........That leaves Soarin, Frozen nd Spaceship earth as part of Genie+
everyone will book Test Track at 7am.....TT availability will "sellout" in short order like old paper Fast Passes used to so people make sure they get on it................
Once it's gone (or even just a late afternoon return time), they will move onto Soarin or Frozen and they will sell out
So once you are able to book your second ride, theres a good chance only thing left will be spaceship earth but that standby time is only 20 mins so why did you buy Genie+ to begin with?
Will never work