The normal non-vet dungeons that are available for low level non-vet players are still terribly overtuned. Group finder unlocks at level 10 and offers a nice looking pot of bonus XP to players who simply don't have the skills and gear necessary to complete any of these dungeons in a reasonable amount of time. I'm really glad that dungeons are hard in this game, but the place for difficult dungeons requiring min-maxing is not level 10. It's not even level 40. It's in vet dungeons.
I'm sure these players would love to do these dungeons, they're excellent pieces of content, but they need to be seriously retuned at the group finder level, especially in the first tier of dungeons. The non-vet, Group Finder flavor of Fungal Grotto, Spindleclutch, and Banished Cells are absurd if anyone in your system generated group is below level 20.
Please, PLEASE, retune these. I and many other players want to play this part of the game in the way you are telling us we can (Group finder unlocks at 10 but isn't really playable until ~30). It's seriously frustrating to have an entire portion of the game be so horribly misadvertised to players.