My idea is that the matrix solver would work on a per-level basis, i.e. you can use the matrix solver to create blue circuits and nest each circuit level, and then copper wire assemblers will only apply to that specific level on the planner. This can be achieved with the normal planner in this case, but for any mod with circular recipes that are nested, this becomes impossible. If it's too much work to do at the minute, i can make a pull request and take a look.
Suggestion
My idea is that the matrix solver would work on a per-level basis, i.e. you can use the matrix solver to create blue circuits and nest each circuit level, and then copper wire assemblers will only apply to that specific level on the planner. This can be achieved with the normal planner in this case, but for any mod with circular recipes that are nested, this becomes impossible. If it's too much work to do at the minute, i can make a pull request and take a look.