I find that splitting the entirety of Denver Center High into "High North" and "High South" makes it almost impossible to follow. A single instruction generally can't be heard because there's about five other frequencies going on at the same time. It's like sitting in a busy resaurant (or more appropriately, an airport maybe). I really appreciate that it's up at all, but I think splitting it up a little more to maybe having only 2 or 3 frequencies per channel would make it much easier to follow, if possible.