yes, there is a combination of things, improve offensive play calling, improved mechanics, Gallup has improved a lot, improved OL, so its seemingly all coming together.
with that said, I have mentioned before, its not necessarily the plays themselves, but the route combinations and pre-snap movements. Dak said, this is essentially the same play book and same plays, but Moore is using them in combination to attack all 9 passing zones at different times which helps put pressure on defense, Dak is sitting in the pocket, one because of OL, but I also think he is making a conscious effort to throw from the pocket and seems to have more confidence in his throws, as last year he didn't. he is letting the ball go sooner, and making more accurate throws. his foot work is world's apart from last year. much more consistent.
it also helps we started off with two easy opponents so to get Moore a little experience calling plays and figure out what works and what doesn't.