Yes you are correct even making Detroit more convenient compared to that mad house called Atlanta.
More convenient for the destinations served from Detroit, which are naturally fewer than the ones served from bigger Atlanta.
However, the bigger hub offers more utility.
Yes but if customers change their travel habits they can force Delta's hand. If you can't get a connection through Detroit you should chose ORD and not fly endless miles out of your way to connect in Atlanta just because Delta wants you too.
We were talking about the market of Little Rock, Arkansas. For this market, Atlanta is a very small detour for most destinations.
Moreover, passengers will choose what is best for their itinerary. That may mean where they get convenient flight times, shortest duration, or plain ol' lowest fares. For some seasoned travelers, it may also include avoiding a hellish connecting hub like JFK.
However, expecting travelers in Arkansas to passionately love DTW is asinine. They'll choose the itinerary that serves them best, Detroit or no Detroit, as they ought to.
A junkie for A340s, A380s, and of course Her Majesty the Boeing 747. I wish they were financially viable, but it is not to be.