Things to consider here:

- It's the first step, accesible for new/lowlvl players to get through leveling easier.
- It's more like a lore introduction (won't spoil the end ofc) for the first 50 floors. You reach lv60 just a few floors before 50th, after that, we'll have the challengeable lv60+ floors with no more lore-friendly fights, focusing on harder fights.

I do agree it was easy, but that was the point of it. It was already said, and I don't know what you expected. The challenge will come later. I like the concept of having to use items in dungeons, having fun picking what to use on next floor or save it for a different one.