If the kevlar is producing the hoop strength, leave it in, even if there is a weight penalty. A broken boom carries a large fiscal penalty, sometimes
But I don't understand why kevlar is used for hoop strength. Please explain why it's used, rather than something else. I always thought kevlar had poor bending strength, with most of that coming from the epoxy in the matrix? I would have thought the optimum would be cf at 90.