Okay, understood. From that list, I feel like there are really only a few things needed...maybe a couple of races (although kender and minotaurs are already available, I believe, and gnomes and gully dwarves don't seem to require much) and the Solamnia and High Sorcery subclasses, and then maybe a few monsters. All of the rest of the stuff you list is fluff content and is available in a variety of forms already. I haven't read any Dragonlance stuff since the 2E days, but I'm sure maps and timelines and the like are easily found, no?
Well, moon magic is a mechanic specific to the campaign setting, it's not fluff. It's not like any of it can be found in the Tyranny of Dragons books as you suggested. Obviously, some campaign settings require more rules updates than others. That doesn't mean we are asking for 96 double sided pages of the 2e Dragonlance monster manual to be converted to 5e, but we do want some support. As for Maps, it's true that we can use the older maps, but that doesn't give us much in the way of modern support. In fact, I can't think of any DL fan who wouldn't appreciate a new DL map.
It think it's less painful to simply continue to play 2e than it is to switch to an edition that has zero support for your selected campaign world.