They explained what was being added weeks ago:
What it is: ✅ Higher Difficulty Series of content that rewards exclusive cosmetic decorations, emotes, and mastery. ✅An extra layer of opportunity for players to use their powerful gear to take on threats at a higher level without having to wait in missions for long periods of time. ✅ A way to engage with some better scaling Affinity and Mod Rewards.
What it isn’t: ❌ - intended to be associated with the nebulous ‘end game’ topic. ❌ - overly complicated in its goal to simply provide higher level content and some exclusive rewards. ❌ - tiered. We are providing one 100+ level pass to be cognizant of matchmaking for our first iteration.
if you were expecting, more, then you didn't bother reading what they said the update would add. Stop blaming DE for your overblown expectations.