The coordinated U2 rebuild still failed: the router could not escape the BOOT, VCC and PGOOD pads, and the attempted rebuild produced 37 copper conflicts. I rolled back the rebuild and removed its conflicting copper.
The U2 block requires either:
- Manual editor routing with direct visual control, or
- A corrected U2 footprint/keepout definition; the current QFN pad geometry appears incompatible with the routing engine.
USB and unrelated interface routing were not changed.