The other open question is whether the ride will open immediately at park open, which is what I expect.
If it doesn't there will be a long line forming before the ride even opens, like there was for the Anna and Elsa meet and greet.
But, to get a first ride on it, I would get a FP for Frozen and focus on Future World first, just like we do now.
Because we usually get FPs in the evening, our normal approach to openings at Epcot is to go to Soarin, then TT single rider, then MS, and are usually able to do all 3 in not much more than an hour. If the Frozen ride does open immediately, that should take a little pressure off the crush at the other major attractions. Instead of everyone going right to Soarin or TT there would then be a lot of folks heading right to Norway.
Once I've had a chance to experience the new ride once, and see how it affects crowd patterns, I would reassess my approach to touring Epcot.
I agree that adding Frozen to the mix will probably move LWTL back to tier 2. It should also open up availability for TT and Soarin. When they open up the extra screen for Soarin, maybe that could be moved to tier 2.