The songs are clumsy and not useful. Mass Suggestion is also the highest level class feature for bards. Sad.

Easy fix:
* Change them into straight SLAs (that allow metas). Make them cost SP or songs, as you wish. Still not too useful, but at least worth hotbarring.

Easy fix 2:
* Ditch the songs, grant a passive bonus to enchantment spells instead.

Generous fix:
* Make them a multi-selection SLA: Suggestion OR Hold (Person?).

Surprising fix:
* Surprise us with a useful ability with a similar flavor.