My opinion...the "deep" transmission pans are a total waste of cash. These transmissions do not "overheat" unless improperly serviced and abused. The operating temperature of the actual lubricant will always remain the same
proper transmission oil temperature is a nominal 180f and will increase when the entire vehicle encounters a significant increase in "load" for a period of time. Once the load is reduced, lubricant temperature comes right back down, same as for engine oil and coolant temperatures.
I'd never run a deep pan on any of my personal vehicles.
A type of "deep" pan is useable on some drag racing versions of these transmissions simply because of the extreme movement of oil under the heavy acceleration loads for a very short period of time.