She’s quite powerful actually, and the way they’ve blended the gameplay with the music makes her pretty much the best implementation of a “Bard class” in any game ever, in a way. (The best Bard before, IMHO, the one in Vanguard, had an interesting “music” system, but it was all abstraction; other games have music you can make, but not as part of the gameplay, so far as I’m aware. Octavia brings those two elements together, the gameplay and actual music, in a fun way.)
However, as someone quipped on the forums, don’t expect FL Studio 12. The music system is extremely basic and is limited to simple drums, and a bass and melody, both restricted to a pentatonic scale of one octave. There are several “instruments” (rudimentary sample sets, which naturally cost plat, and I’m sure there will be more to come). But it’s something, and it’s something nobody’s ever done before in this kind of context, because the gameplay involves you actually timing your strikes, shots and crouches, to your music, wot you made up, to get fairly substantial buffs (invisibility, a fairly chunky stacking multishot buff, and I forget what the melee buff is). The rest of her gameplay is comprised of Vauban-like drops, the Mallet, which does hefty DoT damage, the Resonator, which is a ball that rolls around and gets mobs to follow it (the Resonator can pick up the Mallet to roll around causing chaos and damaging mobs), and the Amplifier, a huge AoE field that “amplifies” the damage of the Mallet. Plus, you also radiate a field of concentric circles (which are timed to the melody you made, and are what you have to time your shots, strikes and crouches to) that has a decent armor buff.
There are already complaints of course, about the limited nature of the music system, but I think given the limitations DE did a pretty good job, and as a Frame, she’s quite stronk.
The quest is fun too, especially the imaginative last mission.