You're not alone, although personally I use Audyssey for music for the most part, but there's quite a few who share your sentiment per posts in this and other audio forums. Try playing a bit with the dynamic EQ, with RLO for music at -10 or -15. Tweaking speaker position may help, too. Big open spaces usually impact your sub particularly; I've got a pretty big space to fill and find multiple large subs helps a lot.