Nah, I quite like Gunn as an addition to the team. His sister dying was a good push to drive him up from street gang and into apocolypse averting activities.
Nope, I liked Gunn, and his sister dying was a believable catalyst for his story and development. I do wish we would have seen a little bit more of his sister, maybe some flashbacks, so we could have understood Gunn in a more complex way.
I think Alona was too young to be a regular, the Angel cast were all older and it was a more mature show, so while interesting I don't think she would have fit in.
The thought crossed my mind that I prefer Gunn to his sister, but would've happily traded Fred for her.
And then I thought of Gunn's sister becoming Illyria...because of a paper Gunn signed...the despair was instantly tangible and I could really see him throwing himself willingly into Hell as he did....and in this case, being rescued by Illyria would be much worse rather than a relief.
Angst galore. I bet Joss would've done that if he thought of it.