I did MSP-ATL briefly, you have to be on icrew at exactly noon at the exact window opening to reserve a jumpseat or it will be gone, and as a newhire you will be on reserve so you won't know your schedule that far in advance. I bid back to DTW as soon as I could. Haven't had many problems with MSP-DTW. There's a bunch of us doing that commute right now, but I still haven't had an issue getting on flights. Plus we have so many flights out of Atlanta, that often your trip will actually start or end with a DH to/from ATL, in which case you can book positive space.