Well I’ve thought about it a bit and based on the description of the feat itself I think bard song now only affects other creatures than the bard I.e. the bard song no longer affects the singer. There’s been a few mentions of the song still buffing people after all, so it would mean bard would rely even more on other players to travel with, which is pretty much a theme for the class to witness the achievements of others. Of course, it’s only a guess.