I haven't found a ticket for this, so despite it being known, I wanted to create a ticket for better tracking of the issue.
https://community.bistudio.com/wiki/Arma_3:_Event_Handlers#HandleHeal ignores the return value. It would be neat if the EH worked as advertised, as it would make ACE' medical system simpler. It would be also nice to have the 3rd param return if the unit is a medic or not.

A nice-to-have feature would be to make the return value an array, allowing to set the following:

• If the damage reduction should be handled by the engine
• If the healing animation should play
• If the item should be consumed
• If the healing has finished (basically integrate AISFinishHeal into the return value)