Probably an unworkable idea, but perhaps they could introduce a way to “tune up” the cooldown on an elemental attunement in exchange for higher burst damage/higher healing/more boon or condition stacks or duration where applicable for all skills under that element. It would be a way to dynamically balance the power vs. flexibility equation, so someone who wanted to be able to sit in fire D/D and do excellent glass canon damage could boost the CD on that attunement to the point that if they switch to something else they would be waiting a minute to get the fire attunement back. Maybe do it in pairs so that “tuning up” fire “tunes down” water, for instance, increasing the CD and power on one in exchange for decreasing them for the other.