When I wire pines I make the coils about twice as small so I get more freedom in bending. Tighter bends means more dramatic structure and less wiring later.
That is my only critique. You did a good job, it's consistent, the right size wire and evenly spaced.
As for wiring over needles: I'm of the school of thought that goes against some popular ideas, wiring should be functional and effective above all. If that means wiring over needles, so be it. I could take the needles off and they would be dead, with wire over them they give back to the plant for another 6 months, most of the time. The needles that can be wired over for structural purposes will never end up in the final design, that'll be refinement and that's a different story. I'm not displaying seedlings in a show, why should I make it pretty and add an extra year to the development while I can go hard now? And being honest, in development most plants are pretty ugly anyways, having nice wire on them doesn't make them better looking. In my opinion it's better to get out of the ugly phase faster, and if disregarding pretty wiring is a part of that, then I'm going down that road.
Of course everyone is their own person and should do what works for them! I'm just saying that if the goal is Rome, the plane is faster than walking. Not as pretty, not as disciplined, but it saves me so much headache.