What is the enhancement in mind? How should it look and feel?
The current NextSwing is only done for the player himself. However for healing and tanking purpose it would be great to be able to predict when the target(or target of target) will hit.

From a healing perspective it would be good to align your heals to hit directly after the Swing or if need to top up the tank before it hits.

From a tanking perspective it could be good in order to know if it is safe to turn, rebirth, innervate etc. Also if a CD is needed in order to survive.

Please provide any additional information below.
Perhaps this is hard ti implement from a combat log perspective. And also it could be complex in case of boss parries? Cause will not a parry lessen the swing time? But Quartz and other addons can add a Swing timer so it should not be impossible