The "transition" of these two Princess was not handled well, in the sense that Disney put them in a place where there simply wasn't adequate queuing space. It's not like the demand was a surprise!
A more prudent course would have been to move them into Town Square Theater until the furor died down and wait to put them in PFTH until the queue there could handle it -- even if it took a year or so. (If necessary, move Mickey and have him join Donald and Goofy in Storybook Circus.) Yes, it's not thematically appropriate, but these are desperate times, and princesses have been shoehorned into Town Square Theater before. Make 4 separate M&G rooms for Anna/Elsa in Town Square and devote the entire space to them (with both meeting from park opening to park closing daily), so that the crowds and waits can be adequately managed. Not only that, but nobody need sprint across the park to get there. Guests wanting to get there at rope drop can go there directly and be out of the way of everyone else.
But of course, Disney never asks for my advice on these things...