Yeah, don't worry, I'll keep the original hope of complete customization. In fact, Ferdinand just got some new features to work that I'll be using shortly- "wire deco". These are models that get added- insulators mostly- on a wire attachment point. Some rotate around the y axis only (pin insulators), some don't rotate (horizontal offset insulators), some will rotate around the y axis and x axis automatically for deadend insulators. The wire type- which has a custom model for each, and custom slack value- determines what wire deco you can choose from.
Here's some screenshots he has recently posted.