I would argue that the Dolphins are in the worst shape of the three. As you said, they have a flawed roster, and are probably looking at a serious decline for Tyreek in the next year or so. Worse yet, they are now committed to Tua, who is injury prone and, even when healthy, is not good enough to beat good teams late in the season.
The Jets still have a lot of talent and will get a chance to start over with a new coach and QB next year. And of course the Pats’ rebuild has already begun and shows at least some promise.