IMO, the whole point of the tiering at Epcot and DHS was that there weren't that many "e-ticket" attractions at those parks, so if you got to pick 3 FPs, it was almost a no-brainer that you'd take Soarin' and TT every day. Once the Frozen stuff opens, there would be 4 major attractions at Epcot, so it would become more like MK.
Personally, I'm hoping the tiering at Epcot goes away once the Frozen stuff opens. That would make the most sense to me. We have four days at Epcot, and if the tiering stays in place, even we would be considering not FPing one of the Frozen attractions.