Volume of traffic is the big differentiator here, but it just adds to the reasons folks don't like flying there. I think DTW is far more predictable and a better layout, especially when you consider the E/W runways are pretty much indefinitely closed. You almost never have to cross an active runway, and if you do, it's rarely more than a 30 second wait. I almost never have to sit "in the alley" to wait for traffic to move to get to my gate...in fact, I rarely have to stop rolling. A "busy" lineup is 2 or 3 jets (read fewer delays/less reroute potential). They almost exclusively stick to the runway for the arrival you're on (I'll concede that, post rona, ATL seems to be doing a better job at this...or maybe it's because I avoid ATL lol). I'm rarely slowed, held or vectored off the arrival for spacing to rejoin later. Even if forced to walk A1 to A78 in DTW, it's generally quicker than going from T4 to A30 in ATL (nevermind going to C52). I rarely have to wade through a sea of people in DTW. I almost always keep the jet when I pass through DTW (another big factor).


But yes your second point is the biggest factor for why I often bid avoid if landing in ATL. For me, it's reroute city. The only time I've been rerouted on my current plane was on days I was flying through ATL. Two of the biggest factors I've seen that greatly impact your chances for a reroute...flying past 1300-1400 and landings in ATL.