I understand your concern about the position given it's recent history: (1) Neal had the learn the position on the fly and was never comfortable there; (2) Shembo, for whatever reason, is simply terrible in space; and (3) Niklas was a massive true freshman who the staff tried to use as a stop gap. In short, we've never had a real DOLB before.
And it has really hurt our defense. As I mentioned previously, one big advantage of the 3-4 is its symmetrical versatility; either of the OLBs can rush or drop on any given down, which makes pre-snap adjustments very difficult. Since we haven't been able to find a DOLB who can cover, Kelly and Diaco have had to make the defense much more predictable by pulling the DOLB in favor of a Nickelback every time they expected a pass.
Unless Diaco is ready to scrap his 3-4 in favor of something more aggressive, we can't give up on the DOLB simply because we haven't had a good fit for it previously. Which is reason to be even more excited about Jaylon; getting a 5

is always a good thing, but plugging in a recruit of his talent at a position which has done more to hold us back over the last 2 years than anything else... it has the potential to take our defense to another level.