What is it you wish to discuss? Your wall of a post looks like its directly out of many books I've read on the subject.
As for your interest in widebands, I've been on both Dyno Brian's dyno with his sniffer and on Pick-ups Plus' dyno with their wideband directly into the exhaust stream. Comparing both to my Innovate that stays on my car, both were extremely close to the reading of my Innovate, I have logs and dyno sheets to show it. Dyno Brian's vacuum pump seems to work fine, especially since he keeps up on the maintenence, and Pick-ups Plus calibrates their wideband before each use. So if you want to knitpick widebands don't waste your time, my $200 Innovate LC-1 was very close to both only reading a lambda of .89 when both dynos showed .88 .
Tuning the air fuel to the rich best torque for safety is common practice, injecting more fuel then needed to insure all oxygen molecules get burned. Each car being different and boosted cars (of which I have no experience) typically requiring more fuel. Tuners have their own motivations for their target lambda.