I'm holding out hope for a DCA-caliber redo at DHS. If that's what we end up getting, I'd much rather see that than Frozen.
I might be wrong about this, but I think you're misinterpreting the Frozen fanbase. I think it's more small and passionate than broad and casual. Frozen doesn't need to be high-capacity because it has a limited audience and that audience is hardcore. The hardcore audience is exactly the one you want directed towards a low-capacity attraction because they're the ones willing to wait two hours for a ride. If "Frozen fans" are willing to wait three hours for a meet and greet, then let them wait three hours. The non-Frozen fans will happily skip it. Contrast that with something like Big Thunder Mountain. There aren't that many hardcore Big Thunder Mountain railroad fans, so it requires a capacity that keeps waits low enough to entice casual fans to ride. Frozen needs no such incentive because those little princesses are riding come hell or high water.
Sure. But those "more ideal" choices would have come at the expense of even more more ideal choices. i.e. it would be a bigger loss for Frozen to get in the way of Star Wars at DHS than for it to replace Maelstrom at Epcot.