Yes, our Drago did have the chopping attachements. I have not been around a 2208 corn head at all so I can't compare the difference in chopping quality between the two.
Lance is pretty much describing what the problem is. The green stalks will form a mist of "sap" from the stalks which will cause the air screen to plug and will cause the engine to overheat. Only solution to remove the sap is to wash it with water and a broom. The weather would have a great influence on the problem as well. If it was cool, cloudy, high humidity, and low winds it was almost sure to be a problem that day. A sunny, warm, breezy day and you may not have to clean the screen all day. It seems that the cool damp days are more common for us here in West Central MN. I also think thay may be why this does not seem to be as much as a problem in the "I" states. There corn plants are usually more mature than up here and they have warmer weather during harvest.
We had several CaseIH engineers come out to try and deal with it without much success. One year they had us try a vaccum deal which was supposed to pull the sap off of the fan screen. Didn't really seem to make much difference. I have been told that the vaccum thing is now an option on the 2588's. Our head did have the rubber belting all the way around it which almost touched the ground so did not seem to help either.