Madrigal will help the K%. Full year of Collins (and Vaughn when he gets here) will help the BB%. I expect Eloy to walk more next season and probably Moncada too.
I'm probably one of the few that doesn't want Abreu back (mostly because of how Ricky will continue to bat him 3rd, play him way more than he should at 1B. I won't even count his baserunning, baseball I.Q., etc in this) but I know he will be and hopefully he becomes more disciplined as a hitter knowing he has protection around him.