They could. So could Fried. At any point in time. Corbin Clouse is a better Pitcher. Thomas Burrows is a better Pitcher. Sobotka is a better Pitcher.
Being "in favor of keeping him for $1.5 million" is fine. I like to waste money every once in a while too.
One of AA's stated goals is to improve the bullpen - keeping league-average guys that will normally be one of the last guys out of your pen who makes $1 million more than any number of guys you already have who are better Pitchers that will make less money doesn't do anything to improve your pen. I like Freeman as much as the next person, but he's simply filler - on any given night, Snitker will use O'Day, Winkler, Sobotka, Venters, or Biddle rather than using Freeman.
He's just fine for $1.5 million - no one's arguing that. Keeping him for $1.5 million does absolutely nothing to improve your pen, and it sure as *ell isn't going to help you cut down on the number of walks your pen issues - and that's the reason the 2018 pen sucked so bad to begin with. Just make sure you never complain in 2019 game threads when Snit brings him in to face a lefty bat (which is idiotic in the first place) and he walks him.
The point is that the 2019 Braves will not be one bit worse if they use any number of Pitchers instead of Sam Freeman. If he's that good, why shouldn't he have been extended? League-average RPs don't grow on trees, you know - yet the Braves have found guys like Freeman on the scrap heap every year for the last 20 years.
(BTW - yes, Freeman made 63 appearances in 2018 - exactly 45 came BEFORE the All-Star break. When the games counted most and Venters and Sobotka arrived, they stopped using him.)