At this point, I think they should stand fast with what they have. I think they have a great starting point and have greatly improved their roster and depth. Once training camp is concluded they will have an idea if Sow, Olayden, Lowe, Wallace, Strange, Bryant and others are worthy of being on the roster.
There is going to be great competition at every position group except QB. At WR we currently have 12 guys that have talents of varying degrees, so when they dwindle down to 6 we should have 6 quality WRs and won't necessarily need to add to it. We also have 4 quality guys vying for RB spots, then decide if they are using a TE or an actual FB. The 4 sons (Steven, Gib, Lari, and Hendo) are going to be a fun battle to watch.
Speaking of TE we have quite a few that could earn spots. I think Bell and Dippre could battle with Lampe as the FB. On defense there is a tremendous amount of talent and it will also be a fun watch. After the cutdown to 53, I anticipate 1 or 2 acquisitions.