Please make Cover have longer range.

[aodhan_ofinnegain]

The range of cover is perfectly fine as it is, and 9 times out of 10, you never really NEED to cover a healer, mostly you will use it on a certain tank busters, just to ease CD management, or to optimize a mechanic such as o11s for example, where you have BRD/MCH take the tether and then cover them so they don't die to the AoE following due to health penalty.
In regards healers positioning, halfway across the arena, inside the hitbox of the boss or somewhere in between, is all fight dependent not a where they should be. The correct positioning is where they can effectively heal and dps, or where a mechanic requires them to stand.