I think they're fine as is.
Quote from CardinalMDM
Not like I'm asking for a method here, but exactly how are people "exploiting" Cursed Chests? Obviously, without Adventure Mode, I can't jump around the game too much, but when I go to an Act now...I start on the last quest so I can bounce around the Act as I feel like, and yeah, I tend to start with areas I know tend to spawn a Cursed Chest. Sometimes I get them, sometimes I don't. And I suppose it does sorta guide where I go to battle, but I wouldn't say it feels like an exploit, even though it has gotten me a decent amount of XP, but then again, so have events like Triage, Crazy Climber, Blaze of Glory, and Blood Ties, and I don't think those are getting nerfed/inspiring bans.
In my opinion, the only thing they should do about Cursed Chests is maybe change the XP reward based on performance: If you start/activate the event, you get a small XP reward for participation. If you survive til the end, but don't get the extra chest, you get a moderate XP reward. The biggest XP reward is for successfully meeting the requirement and winning the extra chest.
That would prevent people from taking advantage of just FINDING Cursed Chests and cashing in on big XP when they didn't actually push themselves farther along and didn't get strong enough to complete them.
The monsters in the "Kill 100 monsters" ones themselves give extremely high amounts of exp and spawn a lot of enemies. This was easily exploited for the Cursed Chest in A1 HoA 3. You just get the checkpoint for the entrance, check for the chest, rinse and repeat with a group. Each person would make their own game and the person that found it would invite the others. Grab a Monk with Cyclone Strike to suck all of the enemies in, and voila. Some of the people I'm in clan with gained more than 20 levels last night, just within a few hours time. And my low paragon friend went from 1 to 50.