^anyway (I feel like posting an essay so pls get off my dick thanks) those little problems with her voice have always confused me BC they're quite obvious and easy to fix yet she always does them. The nasal stuff is just a matter of proper placement and not pushing the damn pitch and its not hard at all to sustain the notes properly in DH's quick little snappy chorus.
Its just sometimes she seems like such an accomplished vocalist and other times even I can sing the song better than her that just confuse me.

But the answer to that is probably because she has to focus on choreo and staging as well so she let's these little things slide. But even if she sat on a chair and served amazing vocals I'd prefer that than half decent choreo and half decent vocals.
One final thought: and finally its time to reach for those high notes. If she doesn't want to do it during PWT to conserve her voice sure whatever. But she has to bring her a-game to the Superbowl. No more wimping out during the final chorus of Roar or This Moment. :wags finger: