A thought for you:
We are early risers. I would LOVE a 7am park opening on our trips.
I'd be there at 6:30, and assume I can get on FOP, then do NAVI - maybe even Navi 2x if you wanted to.
Grab a snack, then hit the fastpass.
On a 7am opening, our fam would probably do this if we wanted to do Navi:
Get to park at 6:30 at the VERY LATEST.
FOP
Navi
Bug out to Everest/Dinosaur - probably NO wait and multiple rides
Back to FOP for FP
Then chill touring with FP and shows for the rest of the time. I'd assume we could find another FOP FP.
We'd probably be done with AK (for our purposes) by early afternoon, and then we'd be in the resort pool for the hottest part of the day.
The issue is that the people who plan on getting there for a 7am open encounter life. Life happens. Even 8am magic hours are tough for plenty of people. Ppl wanna sleep on vacation, and not be rushed. We are early risers, and religiously use am emh, or emm, and hoppers. Those am hours are precious for low crowds, and since we are easy early risers, we are ready for hitting the parks with no issues. The downside, of course, is that we are definitely in bed early tho. We are 100% ok with that.
So my thought for you is that, if you only wanna do Navi before your FP, totally fine.
With a 7am open, I'd assume you can do a BUNCH more before that 8:05 fp window.