Well being at a label only gives her creative freedom in the music aspect. Carrie is still free to do whatever she pleases with her life like Fit52, that has nothing to do with a label.
As weird as it is I thought Sony was a really good label, if you just add the creative aspect to it then it would be perfect imo. I moaned and groaned at them for the longest, and they are not perfect by any means, but to give credit where credit is due, the fact that they got her 25 #1 singles in 12 years, being a woman in country music, is VERY impressive. And while she was restricted, I do think that the intensity of it wasn't as drastic as some make it out to be, especially considering almost every artist is restricted with their first contract. I mean the majority of the songs she was releasing were song that she wrote. You can't tell me she was royally pissed at them for releasing songs like Something in the water, Temporary home, Little Toy Guns, etc. For certain instances, the label's expert opinion might be a good thing honestly, for Some Hearts I thought I remember reading that Carrie was pulling for "I Aint In Checotah Anymore" to be the last single, but the label went with Wasted instead. Now Carrie plays Wasted at literally every show she plays because she loves it so much and is one of the most beloved songs in her entire catalog.
I will say also I've been very impressed how Big Machine handles their promo. Carly Pearce's latest begins it's push week next week, and was very far behind, but the label is utilizing this week, the week ahead of it's push week, to close the gap between the songs, to insure it can reach it's full potential next week during push week. Not to mention they were able to help Reba get a handful of more #1's when she briefly left UMG when she was around her 50s.
For me the biggest thing is promo. Promote the songs good to radio, streaming, and promote the album, to where it can achieve as much success as possible. That's what the label's job is imo.