Wildkeeper reive was obviously intended to be a traditional dungeon, similar to Delve.
The way a dungeon is supposed to work, is you kill the trash mobs to get to the boss.
In WKR you attack one monster, and the boss comes at you instantly. Totally negating the trash mobs, to the point why are they even there?
How WKR could be improved:
Remove shared aggro, allow players to kill trash mobs to get to the boss. Make it more similar to Delve, add the lower tier minibosses too.
Don't allow the main boss to be engaged until the lower bosses and most of the trash is killed (to stop some joker going right at the main boss and super tanking to kill it asap)
Give players job points / mlev for killing trash, minibosses and the boss (this makes it really good content for casual players).
Upgrade all gear from this to 119 (but don't change the stats, this is so the gear is at last useful to new players and they get 119 trusts).
Give plasm too, for things like monthly objectives.
WKR is newbie & casual content, it's community content (that the game is severely lacking) where players can actually work together and fight together with established players without having to be in their group.
It should be improved, when I came back to the game long ago after playing others titles I loved WKR and it was the thing I always ran into if it was up and someone shouted. It allowed me to play with others and it was a thing that didn't just one shot me with my 117 gear.