I think the Speed3 has a factory wideband o2 sensor, not sure if its the best in the business or anything but I think its good enough to give fairly accurate AFR readings for what I want at least. It sounds like the AP is going to do what i need it to, help diagnose issues with CEL reader and data logs, help make sure that a few mild mods are safe, and allow me to return to factory settings. I don’t have a ton of knowledge on making tunes but i know enough that if someone sent me a map and my car did any of the things you described I’d notice and get it fixed.