I am hopeful that this is a "Step 1" in making the expert dungeons just a little more challenging.

I'm not saying "MAKE THEM EXTREME TRIAL DIFFICULT" -- just making some of the mechanics a little more one-shot if it was an idiot move. Still maintain it so it's fun to play but give the punishment something other than a vuln stack.

Maybe give the player a "slow" debuff when they need to run to the other side of the stage, giving healers a reason to pull them over or they die.