Different Type of Rooms in the Crucible
I have noticed a lot of people complaining on the forums about the lack of gear dropping from the Crucible. And, the only reward you can get in the form of gear is either the chests from Cyvion the Echo Knight or buying items from the Seneschal. If you have his store unlocked.
Since the Crucible relies on 8 different random rooms before Cyvion. Those rooms can serve different purposes and have a lower probability of appearing. Instead they offer unique rewards offering an incentive to replay the crucible.
Some examples:
Treasure Room
A room defended by a single boss, can be one of the previously defeated bosses. After defeating the boss a treasure chest unlocks which contains goodies.
Defense Room
A room with a single artifact that needs to be defended from enemies for an X amount of time. Several waves of enemies spawn in and make for the artifact. You need to eliminate them all, and when successful you can claim your prize - a special type of equipment perhaps.
Parkour Room
Maybe a room that works like a parkour, similar to how you had treasure rooms in the void in Warframe. It could be something similar to when we were carrying that flower and high as a kite. You have 1 chance and unlock a treasure chest with items on success.