They aren't ridiculously difficult. They are faster paced yet still very easy to do and this is probably why they have been making classes easier to play.

The Heroes' Gauntlet was not difficult. It's actually one of the most boring dungeons and I'm so tired of doing it. This is a welcome change in EW.

They are dungeons, so if you do get hit by things you will probably still get through it. It's not like savage where your mistake wipes everyone else, so you can get a res.