No NFL team is complete in roster assembling. They normally get to a point where they do not make too many roster moves, but that does not mean they won't make any transactions. With training camp right around the corner, there will be plenty of storylines to monitor around the league with some names that might pop up on the trade or chopping block on other clubs.
With names likely becoming available, the Steelers will want to try and find upgrades over some of their current personnel. That could lead to some other free agents being signed or some other trade options being explored. Omar Khan has been aggressive and that should not be expected to stop just because the roster sits at their 90-man limit currently.
Steelers could look to add depth at slot corner if their options fail
Plenty of cornerbacks have been given the opportunity to gain snaps in the slot during minicamp. There are not a ton of answers at that spot on defense, but this could become a significant issue for the Steelers if someone like Patrick Peterson does not stick in that role. Unless someone unexpectedly emerges outside of Peterson, there will be movement at this position.
Luckily for Pittsburgh, there are a couple of free agents still out there waiting for a chance to make an NFL team. Bryce Callahan has a lot of experience as a starting slot corner and should be an upgrade over Chandon Sullivan. Another name that could make sense is Troy Hill, who had some of the best years of his career while playing in the slot.