I am taking over electronics hardware development

The previous board was literally the worst PCB i’ve ever seen. EAGLE’s
autorouter should not be used under any circumstances. I can be quoted
on both of these statements, and will not apologize for either.

That being said, I redesigned the entire board using the 32u4 Breakout
board, proper SMT, proper layout, intelligent routing, PoRC Spec, and a
visually symmetrical design. The design should still be checked, as the
connections used are not necessarily correct.