(Disclosure: I are software dev and do not know medical anything but can read good, so I just do a lot of that)
Neural implants ALREADY re-wire muscles; more, they can actually stimulate nerve regrowth (you trying to use those paths actually help them recover; Kill Bill style). I don't see this improving that effect, except that it's a better form of implant (less downsides)...
...however, I wouldn't be surprised if it was better enough than existing implants that you can do something new; namely, make artificial nerves to replace damaged ones... and I wouldn't be further surprised if the effects of the mesh act as a scaffold to promote cell regrowth, like the 3D printed organs.
That's just nit-picking about terms though, it is clear enough what you mean - except that growing the exact same network still doesn't give you the exact same synaptic strengths of each connection. And I don't know what you mean by replicating the existing network - do you mean a technique to recreate the exact same neural network? But even if you manage to do that, where are the boundaries, how do you know which connections matter and where do you stop? I probably don't understand your plan though.
I wonder if this is going to help e.g. paralyzed patients to re-wire (some of) their muscles. Will likely help to wire up prosthetic limbs.