I taxied around DFW last week and I didn't have an issue with the taxi centerline and edge markings. I don't recall the edge markings to be an issue in DFW. I'd wish AA would revisit the "before takeoff" checklist and eliminate the heads-down time (at least on the Airbus side - can't speak for the 73).
I hope one day taxiline colo(u)rs are invented that are visible at night especially when it's rainy.