Wow, way to go at pulling a lot of info together into one post! This thing needs a sticky so I can point people at it. The "basic theory" of tuning is really quite simple, but you did a good job outlining how tuning a Subaru can be confusing for those un-initiated to the Subaru ECU. I urge anyone (even those just logging and playing with some OTS maps) to read through this thing. Twice.
Good job Bad Noodle.