My only problem with the boss rush.
The attack values. If you get hit once or twice you're dead. 4k? fine. 5k? No problem. 6k? Sure. 7k? Manageable. But 10k? Those are act 6 numbers. Its simply too high for someone who uses 4/55s and 5/50s. Over 1k damage per blocked hit. Higher end players will tear through this in 10 minutes, but newer players that actually need the rewards will struggle. Thats it. Other than that, I think kabam has done a great job