Note: Post contains spoiler for monster and magic item mechanics. Might ruin player's experience with Caves of Chaos adventure.
For better or worse I'm seeing a strong undercurrent of bringing the awesome even at low levels here from both PCs and monsters. Abilities that would normally be the province of much higher level games or were unheard of in previous editions are present.
- 2nd level rogues get low light vision after a minute of adjustment.
- 2nd level fighters get to make 2 actions on their turn twice a day.
- Turn Undead stops all undead within 20 feet of you who fail a Wisdom save dead in their tracks - no limit. Can be extended with your action.
- Spells that turn the tide of battle dramatically.
- Protection From Undead bars undead who fail a DC 18 Wisdom save from the area for an hour.
- Potion of Strength grants the imbiber 18 strength for an hour.
- Trolls that regenerate 10 hp a round.
- Wights take 1/2 damage from all weapons that aren't silvered or magical. And can reduce your max hp by 3 on each claw attack with 2 attacks per round.
- Owlbear hug. That is all.
It looks like they are really seeking to ratchet up the wahoo factor of the game. I think its fair to judge the Dwarf's poison immunity with all that in mind.