It sounds good..
But a lot of that information like people are saying is readily available in aftermarket ECU. Even the S-AFC will display REVS, AFM voltage, o^2, and TPS -- and readily had for $400 now plus of course the adjustment factor. Its not everything your device looks like being able to display though. Will be useful for tuners I'd imagine.
The pFC is a full replacement, so yes, it does monitor all that (and probably more). Well it has to, to drive the car! In fact it does away with the total diagnostic port altgoether which is just for the stock ECU.