Good breakdown, Phi. I agree with TomD and you, in that Safety is my biggest concern going into next year. Both our 2-year starters are gone, and behind them we have two guys who have experience but had some injuries (Burrow and Smith), and two guys with very little experience (Hooker and Arnette). I have seen Birm say that Felder and Davis are pure corners, and the next guy most likely to commit (Fuller) says that we are recruiting him as a corner. Wint, from what I remember is likely to end up at safety in college, but might not be ready to contribute in year one (could be wrong, though).
I'd imagine that there could be another DB/CB currently on the roster that they would consider at safety though (Webb, Lattimore, Norwood, EGW, Ward). Seems like plenty of options, just not a true safety that has a good amount of experience or hasn't had any recent injuries.
A lot on here will constantly talk about DT like it's a huge (no pun intended) problem. We at least have a few, who haven't had a recent injury, and who have some experience currently on the roster (Hill, Munger, Sprinkle) to go with our inexperience (Alabi, Hamilton, Landers, Barrow).
Other than those two positions specifically, it seems like the past 2-3 recruiting classes (2016 included as you showed) have done a good job of filling out depth across the board to fill in when a guy graduates or leaves early for the NFL.