Nice changes and unexpected too. You're tackling one of the biggest gripes about Bards...too many songs to sing and nobody sticks around. Though i feel you aren't addressing the other big gripe about Bards...the buffs are insignificant. Yes you made them stack better but they don't scream "hey lets leave this slot open for a Bard instead of another dps" in a raid. With how over the top this game has become with buffs it's a little silly to pull punches on an unpopular class.
I really hope these changes are just the first of more changes to Bards like looking into their enhancements. Spell Singer could use some help, maybe more more utility arcane/divine spells to grab from or giving them CHA to attack/damage (capstone or T5) to help them in melee a little more. I love playing a Spell Singer but feel beyond providing weaker/less diverse CC and spot heals i can't contribute much (though the song changes help).
Am i reading it wrong or are the aoe songs now only work in the aura? If so this is not good news for Bards where they were only tolerated since you can apply a song and party members can run off. Also to bring up what others are bringing up, Inspiring Echoes needs something unique back. Something that would be useful on non-weapon items as well should you want to ever use the effect again. Maybe a stacking mana efficiency (will need to be at least 10% to justify wasting the slot) to all players when in range or something tasty.