I play Eden editor more than anything else with ARMA 3. The current version is great. Some suggestions for future updates are:
1. The ability for the player to customize AI positions. For example if I want to place an AI sniper on a roof or something similar, I don't want him
standing up but currently this is the only option. There is only two more positions needed. Kneeling and prone.
2. It would be great to have a total number of enemy killed notification through current map view. Not just amount you killed as a player.
3. A replay option to be able to watch how scenarios unfold afterwards from different perspectives including individual enemy's.
I may add more in the future.