The AP does not have a boost controller built it. It has a boost gauge reader that reads from the solenoid that the ECU reads from.
Depending on the map it has less or more boost. The map has a boost table to go by depending on load. Stg 1 boost map is less than Stg 2 based on flow through a downpipe vs stock downpipe
The AP does not have a EGT guage available in it. EGT guage would be used to reference that the car is not running too hot. Most people that tune would want this gauge or anyone that would want to know thier exhaust gas temps. It is not a requirement though in purchasing an AP
With a full turboback you would be Stage 2. The nice thing about the AP is if you don't know how to tune, then its a great choice for someone wanting EM