The Cowboys have been a bend but don't break defense which has helped Jones, however with the new D coordinator I think you're going to see more press which doesn't play well Jones. Even with his speed he has issues locking down receivers.
It will be painful at times this year without him.
We only really got 2 seasons of effective play from him with all the moving around he had to do.
So that is we will miss his play, but not so much as if he was a 4 year Pro Bowler, like with Amari should he too leave.
Somebody in the thread said Jones was really more of a track star who could play football. Which I guess is true given his broad-jump skill etc.
So In the long-run, finding a true CB who is primarily a footballer with CB instincts will prove better and show up quicker than Jones did.
This draft may or may not address CB well enough. It may have to wait until 2021to fix it.
We will see.