I disagree. Each boss drops a specific item so you have to try and beat every boss each week. To get those though you need keys so you need to play at least 7 waves (doesn't matter if its 7 round 1 waves) and then get a key from Ana. If you don't get a key before you get to the boss and kill it you can't get the loot.
The 3 EP weapons available from the chest are 5% random drop rates so RNG has to be on your side. You also have to do waves for certain quests such as Sleeper Simulant.
I agree that the other EP weapons are available from wave 3, 5 and 7 (i think, not 100%) and drop at soft cap but still a worthwhile reward.
If people aren't bothered about it, they're entitled to have their opinion. For me, if the gameplay is good and rewards seem decent which they are imo, then its good worthwhile content.
until