Low boost, you might refer to it as "Normalizing". Not much heat compressed into the air charge at those levels so yes, a cooler not important - in fact might hinder performance.
However, if it's the thrills and chills of a noisy, squawking BOV, then depending on valve chosen and turbo flow, you may not have enough blow off to make the noise. I find the sounds are cool but you can only roll on and off hard so many times when your bike is a daily rider. For "Show" - guess that's another matter.