You can lockpick that chest with 0 Lockpicking skill. You can craft the helmet from the hammer and cooking pot with 0 Crafting. Try it! That is entirely intentional and not a bug. I don't think Tutorial Henchmen would add much to that dungeon. It could also distract from the focus on the Source Hunters.
My own Tutorial Thought: The ending is anticlimactic.
You put a couple vases on the two-pressure-plate door to open it, and after that there are just a few bone piles and empty vases, and a comment that you've reached the end. It feels limp.
Suggestion: At the end, before the comment, add in Ragequin, the boss which the mummified skeletons mention. He auto-initiates dialogue, and you can either try to fight or talk your way out, and this serves as a Dialogue Options tutorial, which teaches you about persuading people to solve some quests without killing, and how situation bonuses work.
If you pass the test, he runs off and vanishes or something (and you get the same XP from the dialogue check as you would from killing him, but attacking him after winning dialogue gets you no XP for killing him).
If you choose to attack or fail the test, he initiates combat and it's a mini-boss fight.
