I don't think they'll be cut entirely, but I could see them being removed as separate actions, and combined with the songs as a bonus effect, to both allow for Iron Jaws to be removed (3 buttons no longer being needed means space for new skills), and to allow competent song usage to maintain 100% uptime on the DoT, instead of scrabbling around for Iron Jaws when there's 3 seconds left, or having to reapply them after a boss leaves the arena.

Oh, and a personal request, please give BRD all 3 songs before 50.