Many mortal players dislike the combat healing, because with it players are forced to put all their attention on healing. Out damage the healer, kill energy healer, and protect their own healer. In the long term, players get bored of the healing. In combat, what they do want to do is to kill opponent healer while well protect theirs.
How to solve the problem and the solution to the issue is to make a healer change. The perfect way is to make any healer small. They might keep you up for a few more seconds, maybe give you a chance to retreat a little. They should not be used to save your life. In mortal combat, combat should be designed to revolve around battle tactics, not charging into the enemy know that the guy behind you will heal all the damage you take from doing something stupid.