I told my guild about this yesterday, but in Warframe they have their own bard, Octavia, a Warframe that comes with a Mandachord. The mandachord is a device used to create a beat for each skill. During combat Octavia can cast their skills while each plays a beat that can grant buffs and debuffs. I find Octavia to be one of the best Bards in any game because of this. Here is an example of how the Mandachord works.
https://www.youtube.com/watch?v=BN4PmEQNTUg
One of the best things Octavia's release did in the Warframe community was to allow creative musicians to come together and create music with different Octavias, of course there was a Maestro in all this. I think having something similar to this would be a great addition to Bards and would definitely make Bards unique.
https://www.youtube.com/watch?v=6mNp2Zy53Os
The mandachord has a large library of sounds and I'm not suggesting techno, or modern sounds, but using using sounds from traditional sounds, in fact, you can create your different beats and switch them so it avoids repeating the same song for hours.