Please let bosses drop loot. I killed Sepiks several times and he never dropped loot. Just the Summary at the end. I think he should drop those shiny engrams.
They do drop loot those engrams are loot. At the end you also get loot too my guess is that the rates you want well obviously have a low chance because of they dropped often the game would be too easy and not really a challenge. Although you do have a legitimate concern I feel that it's fine the way it is. It does have a loot system just one that isn't like all the other games out there and I am fine with that because some change is good a new way to look at things is always refreshing rather than a traditional loot system