Precovid MSP North side was almost all regional jets. A, B and the vast majority of C gates were occupied by ERJs and CRJs. And they "planned" to open a 717 base there. I don't think it's any state law stuff and more just a return to normalcy.
-replaces RJ flying and brings it to mainline
-upgages that flying
-Replaces the soon to be retired clapped out NW 320's
-Replaces the 717 on DLs original intent of opening a small NB base there.
I think you'll probably see some shrinkage on the MSP320 side that's doing all the flying I used to do on the RJ there.