Even if increased DAK attendance is coming at the cost of DHS and Epcot, this could be seen as something they are fine with as long as they didn't lose days/on-site occupancy to those who want to stay at Universal.
With VB opening at the exact same time and marketed as a third park, staying status quo and not losing days to Uni would be a win in this situation for Disney (and it adds life to DAK). Think of this as the opening act by Disney... Star Wars is the Main Event + various other projections are just the cherry on top.
It's easy to look at the situation and say "did attendance improve? no? FAIL!" - but we often say competition is a win-win for the customers and that has never been truer. Universal is in full build mode, but now we are seeing that Disney has been kicked into gear too and if Pandora is essentially the opening act for Star Wars - a franchise people actually care about - then watch out.
I just think it will be interesting where the numbers stand at WDW come 2020/2021. Perhaps
Avatar 2 will even be out by then