The problem with X-Men and all X-People is that everything comes down to genetics. Genes are spliced, swapped, cloned and mutated everywhere, and that means new characters can appear on any day, at any time. X-23 is one of them; she's a female Wolverine clone, complete with claws. Depending on which Wolverine or X-Men timeline you subscribe to, you could even class her as the 'current' Wolverine (although that will depend on your take on whether the original male Wolverine is dead or not).
Aside from the gender, not a lot has changed between the male and female versions here. The outfit is the same, the skills are the same, and even the genes are the same. X-23 is neither an upgrade nor a downgrade from Wolverine, just more of the same. It's great to have a female Wolverine, and we love the basic concept, but we can't help but feel that more could have been done with the idea.