I would like to suggest that a friendly fire toggle be added to the game. Currently combat isn't enjoyable for me, but I think a toggle would help improve things.
Now there are some of you who are leery about adding a toggle. The main concern being balancing issues. You don't want the game balanced around the assumption that there is no friendly fire. I agree. The encounters in the game should be tuned for friendly fire. That's probably what the majority wants. Yes, combat would be unbalanced with the toggle on, but that's acceptable to me.
What I wouldn't like though is friendly fire and the difficulty slider being coupled together.
I don't like friendly fire in RTwP games. But wanting its removal isn't equivalent to wanting all aspects of combat (number of enemies, the types of enemies, the strength of attacks, etc.) to be easier and vice versa. This is why a simple toggle would be the best option.
There have been a couple of other threads about friendly fire, so I know that there are others who agree with me. Maybe if we all express ourselves, we can persuade the developers to add the feature.