I actually fine with this production as well as MDNA that her voice sounds tinny almost. Has a weird vibrancy that sort of hurts my ears. I wish they had softened her vocals it a bit more. They added major vocal enhancer in Iconic. I actually really liked it.
Like A Virgin is one of the few songs that was sung fully live and they obviously could not use those for the film. Rest of the songs where she does not sit down were relying heavily on backing tapes so the "cleaning up" is less obvious.