Oh, I did not realize that this is all about personalities
Sounds to me like you are more interested in revealing the sins of the performance crowd then in a DIY ECU then. I do not know why O2 is not on the pinout you are looking at, but we both know that a O2 (Wideband O2 usually) is an essential tool for engine tuning, and it does not matter which goals you have. You would find a configurable WO2 decoder in
ego.c
Once again, please excuse me for daring to post about this project here. Since I am a noob here and you are a regular, I submit myself to your judgement.