I haven't found Dace Bonearm to be as reliably effective as some of the other HWKs
Really?
Because I think 2 damage on a ionized ship at the cost of a stress is pretty good. Plaob on the other hand, I'm a little bit more iffy about.
Yes being able to steal a focus is nice, and he seems like a natural fit for the blaster turret. But the simple answer to that is the other guy just doesn't take focus actions and then he's no better than a generic HWK really.
Now admittedly he does serve as a nice control unit, because it does limit the options of the other player, and not being able to take a focus, means lower damage output.
Don't forget that he can also strip Evade tokens. I'm not sure if that's enough to change your opinion.