Its VERY dense. Both in terms of things to do and things to think about when building your character.
To be fair, I have very little dnd experience. Dnd vets probably have an easier time building their character/party.
The maps are huge and they do a fantastic job of turning, seemingly small tasks into lavish questlines.
I constantly find myself being like, "Ill just check out this little room in the back" Which turns into a 5 hour quest cause I discovered some button that opened a secret doorway behind a bookcase and took me to some whole new shit.