Personally, with a factory installed oil cooler, an aluminum pan would be of no benefit to me. I'd rather have steel which is stronger, more resilient, and invisible to passers-by.
Aluminum will break if you take a 'road shot'. The road debris (in the dark) that caused the damage you see was done the night I tested the Gen3 swap for the first time. I ran over a
BLACK oil-filled radiator style heater that night. 50mph. It actually lifted the car.
Your aluminum pan would have shattered, dumping your oil all over the road.