Also because we will likely draft a DB, I look at this signing as insurance in case a young DB we want 1) isn't there, 2) we draft a young DB that will need some time to be ready. On Paper Ball 6'2, Norman 6', and Bene 5'11/6' (depending where you look), with a 3 Safety rotation of Boston, Harper, Coleman things sound a bit more solid than this time last year.
Factor in we'll likely add a DB/S via draft or UDFA or both the room for potential is nice with proven commodities already on the roster.