LDK evaluates elementary school principals. Sharon Baskerville evaluates middle and high-school principals. Head principals in upper-grade buildings evaluate assistant and class principals. Candidly, the process doesn't solicit parent input. LDK says she is in the buildings a lot, and meets every 2 weeks with AAEA leadership, and these are among the many ways teachers have input.
Teachers also fill out annual surveys, which the principal alone sees.
This gives private feedback directly from teachers to the principal. Some are ready to do this, others less so. The Key Indicators of Student Progress suggest that one critical success factor in student achievement is building-level ownership. Building-based budget control is consistent with this. But there are no plans at this time to do it.