yes, it's true that Kitna has played a huge part in seemingly improved mechanics in Dak body of work - there are still a few ties where we see balls thrown behind receivers but so far not near as discouragingly as in the past, more so Dak is challenging the middle and deep seams and not showing the over cautious safeguard as in the past.
Kitna himself has been groomed and worked under the brilliance of Mike Martz and much of what he learned as quick set up release, progression, huddle pace, getting ball to best weapons and distributing to several targets, and a much more over the top, push-the ball-downfield mentality as well as aforementioned throwing mechanic working you just mentioned has a lot to do with what Kitna learned thru Martz and what kitna is putting into what he learned and applying it to working with Dak and getting quick learning and results from it,