Hunter's Mark is unpruned in Shadowlands as below.
It is on the GCD, meaning it cannot be transparently macroed into other abilities. In its current beta form Hunters will need to spend a GCD on every primary target throughout the expansion and all Hunter single-target abilities will be balanced assuming this 5% debuff is applied.
Code:
Hunter's Mark
60 yd range
Instant 20 sec cooldown
Requires Hunter
Requires level 7
Apply Hunter's Mark to the target, increasing all damage you deal to the marked
target by 5%. The target can always be seen and tracked by the Hunter.
Only one Hunter's Mark can be applied at a time.
The cooldown of Hunter's Mark is reset if the target dies.
How do you feel about this?
Edit: Added latest change, it has a 20s cooldown now.