The chase for a big name corner (Sherman and Johnson were rumored) was prior to Howard's emergence. That in addition to how well Tank performed as a rookie leads me to believe such pursuit is over with.
I don't think the staff expected Tank to sniff the field as a rookie behind Maxwell, Howard, Lippett/Verner, and McCain. But injuries (Lippett) and suckiness happened, and he took advantage of the opportunity.
CB is now a serious strength, IMO. Howard looks like a potential star, Lippett was very solid in 2016, McCain has finally put it together as a nickelback, and Tank showed a lot of promise as a rook. I know they like McTyer a lot as well.
What I like most about that group is that they're all young and still developing.