The injuries made it impossible to properly evaluate Randall and Rollins last season. They may still have a bright future with the team. Those injuries also proved how risky it is to rely so heavily upon inexperienced UDFAs for depth behind the starters. TT & Co. presumed they were prepared to weather the typical injury ill-winds. They weren't prepared for the storm that actually did occur. To me, the first two picks of the 2017 draft were a strong reaction to such an unfortunate miscalculation.
Generally, I prefer not to look at the addition of draft picks and those rare FA pick-ups by TT as (assumed) replacements for the top of the roster unless free-agency/the cap are what depleted the top of the depth chart directly. Instead, I view a draft pick as being more useful to serve as a replacement who will eventually strengthen the bottom-end of the depth chart with talent and greater versatility. It allows the team to upgrade to having more talented backups at the ready.
Performance and injury will continuously cause adjustments to the depth chart which, as always, will be far more dynamic than static in nature. That does not mean that the draftees cannot become starters as rookies the way that King probably will right from the get-go. And it's also possible that another of the most recent acquisitions, such as Jones or House, could also secure one of the primary starting positions (if there is such a thing anymore with all the packages and sub-packages) based soley upon their progression along the way. Finally, perhaps a few of those raw but athletic UDFAs from last year -- Brice, Hawkins, Whitehead, Waters and Marwin Evans will actually make that much ballyhooed but never guaranteed second-year jump.
Along with personal growth and the addition of the two new DBs from the recent draft, an abundance of bonafide talent would be a welcome pendulum swing in the other direction in helping to even-out last year's unmitigated disaster at DB. We know that injuries will inevitably strike again somewhere. We just don't know when, how many, nor whom they will affect most and for how long. This year and on paper the DB position group looks to be in much better shape than it was for most of last season, especially in the playoffs.
DBs are going to go to IR once again. Others that are eligible will also make it to the practice squad. Some players simply won't be good enough. There could even be some talent healthy and worth keeping around that will get lost in a numbers game at cut-down time. That's a good "problem" to have IMHO.
As last season proved, it would be far better to have an abundance of healthy, experienced and versatile talent on the DB roster from top to bottom than to not have enough -- especially when, purely out of necessity, the bottom of the roster may need to serve as the pool of starting players. A dearth of talent and availability adversely affected the RB position last season, as well. The season before it happened with WR.
This season keep your fingers crossed regarding injuries to the DL, LB and especially within the OL group, which may arguably have the least proven talent now sitting at the bottom of its depth chart. If cluster injuries hit hardest at any one single position once again this season we may see a repeat of the kind of struggles that we have witnessed occur over and over during the course of the last few seasons.
A little bit more dabbling into free-agency (for mid-level-type backups with experience) might help to better ensure covering a mass injury situation than raw UDFAs are capable of providing, but that's another topic altogether.