[twarge]

I am repelled by the notion that software requires a constant stream of tweaks to be healthy. If you look at the issues on GitHub, there are basically no open bugs there; it's all feature requests.

You can set a net or net class to have a set of geometric constraints suitable for a particular impedance or current or voltage. This matches or surpasses the capability of every other EDA software that I've used.

I also think it's unreasonable to ask EDA software for a full on FEM simulation. You wouldn't want to do that with the full board geometry anyhow.