Barron is just 22. Imagine Matheson or Petry at 22. These three players weakness at 22 was decision making with the puck, but the three of them had/have all the other assets needed to be a very good D in the NHL, size, speed, lateral mobility, shot. Decision making can be improved with experience. Also, playing with a best group of forwards in the future should help a player like Barron. He will have better pass options.
If you're willing to wait as long as it took for Petry to become what he became when it comes to Barron, with the remaining flaws inconsistency, you should perhaps look to see if Mailloux, Reinbacher and a veteran UFA to play with Hutson won't get you to a much better place much faster and without as much negative fallout on the ice as when Barron screws the pooch defensively without being remotely physical his own zone?
After that, it's a question of not having enough room for everyone in a role that they will accept without ruining their confidence.
I don't think we can go with Barron as 7th D without scrapping any upside he might still have.
I just recommend that we play him a lot, defensive warts and all, including on the PP (pairing partner with Matheson on PP1, or as the D on PP2) until the trade deadline next yearend trade him then at a higher value to make room for the others.
We end up with at least another 2nd round pick in 2025 (3rd one, as of now) for Barron, IMO. Either that, or keep him as depth because we would also be getting rid of Matheson and Savard by then.
Have Barron fight it out with Mailloux and whomever we get as a veteran D to play with Hutson.
I'm certain that Barron would not be a good pairing partner with Hutson and that we're better off with Reinbacher to play with Guhle as a shutdown pair. Mailloux, while bringing similar (if not better) offensive upside than Barron, can at least bring a better physical element, while also bringing the skating that Barron brings.
At some point, why force it with Barron when you have better options?