+1 Friendly fire should be standardized within its categories. For example: Grenades, onmap artillery, offmap abilities and so on. Atm it is not very user friendly, because you can't know all the stats. Some abilities kill your own troops outright while others do next to nothing.
Friendly fire should always hurt somehow (although team killers exist). It is just plain dumb if you can safely call in fire at your own positions/troops to fend off an opponent push.
yeah totally agree. at least you should be punished if you run into your own artillery fire. i'm not sure if it is possible to differentiate between ff against player-owned and allied troops, but if it is it might be a good idea to have relatively high ff mulipliers for your own units and less drastic punishment for allied ones.