Some bardic stuff.
1. A 'music playing' emote, separate from 'Bardsong' ability. Would be a boon for my current 'magic-free' PC, but also perhaps for other non-bard performers.
2. A greater variety of musical instruments with a bonus to perform, including panpipes, flutes, guitars, harps and the oriental instruments (if the animations ever get fixed on those), it need not be anything over +1 or +2, though a couple of higher ones would be great also.
3. In light of Bards' affiliation with culture and language-related knowledge, perhaps a new feat allowing them to learn an additional 1-2 languages. It may have a number of per-requisites, like perhaps a minimum Bard level, minimum INT (and/or CHA) stat 12/14+ and perhaps a minimum Lore skill, or whatever else it may feel necessary to balance it out. From where I stand, it would be an aid in RPing the performer's immersion in various cultural traditions.
4. An item which would permit for recording and playback of actual tunes IG. If there is an interest in implementing this, I may actually have certain resources that may help facilitate it.