I am based at RBD, came back from AUS about the same time of this accident, and flying that evening was pretty challenging. Very low cigs, gusty north winds, low vis with a rain mist. All of those environmental factors combined with flying the biggest twin Cessna made makes for a pretty big workload for one person regardless of experience. Based on the track log on Flightaware and my own experience flying that night, he was solid IMC for at least 30 minutes leading up to the crash. I was assigned similar altitudes coming back due to DAL and DFW arrivals and departures. That long in IMC is stressful for any pilot, but then you don't have an extra set of trained eyes to crosscheck everything while managing that big twin Cessna, it wouldn't surprise me that too high of a workload contributed to pilot error.