Here's my take, and a few questions...
1. Will you be park hopping? If so, we found it helpful to hop to MK for the later part of the day, assuming MK will be open fairly late.
2. You can now modify your G+ choices. When choosing your passes, the time of your passes jumps around, or can jump around.
Here's what I mean: At 7am, it may appear you are being offered a 9am pas, but then between the 1st screen and when you actually book the time will jump to a different time. Only the time on the last screen is correct. This is especially true at 7am. Later in the day there is less jumping, but it can still happen later in the day.
As soon as you book a G+ pass, you can go back in and 'modify' it. It is a little hard to find the modify option, but it is there. You might have to refresh a few times, but I was often able to get at least a little better time with just a few refreshes.
Use an app called "Atomic clock" to get your first pass at exactly 7am. I was surprised, to discover phone clock was off by a few seconds. Run Atomic clock on one phone, and ME on a different phone if possible.
By mid-day, HS and Epcot were out of useful passes, but MK still had just about all attractions available. So around 2pm, I started booking PM passes for MK. Otherwise, if I wasn't hopping, I would not buy G+ for Epcot. Hollywood Studios is a mess no matter what. The popular attraction lines get long early in the day.
Another long-standing way to beat crowds is to zig when others zag. (That means: try to avoid doing what everyone else is doing when they are doing it.) If you plan to eat a quick serve lunch, a simple way to zig is to eat lunch at 11:45am, instead of noon. If you try to eat 12-12:30pm, you will be in the crowd. If you arrive just a few minutes early, there is no wait. If you can't do that, then consider having dessert before lunch. There is no line for ice cream at 12:15pm, but a long line at 1pm.
All of WDW's attractions are fun. If you don't get the popular rides, don't sweat it too much. Just ride what you can ride, and see the shows you can see. There is SO much to do in WDW. It is just non-stop. Take time to look at water fountains, and flowers, and live entertainment. There are many things to see that have no wait, they just happen right in front of you and are fun to see.