So what? Willy Wonka begins and ends with Gene Wilder. 
End of discussion.
"But not for this one, I can never get that Ooompa Looompa song out of my head."
I think that for this one they left out the songs. From what I understand Roald Dahl's widow had ultimate creative control, and the movie will be much more true to the book than the Gene Wilder film.
So what? Willy Wonka begins and ends with Gene Wilder.
End of discussion.