The pan can help, since the increased fluid volume and lower temperatures means less overall wear and tear on the transmission (though you should keep to a decent fluid change interval). The extra capacity doesn't have an effect on the transmission cooler function. The only intercooler that can cause a spike in temperatures is the Wagner, as its extra height interferes with airflow through the transmission cooler to a slight degree, however, with the pan lowering temperatures as it is, you probably won't see enough of spike to cause issues.