I'll have to double check the airbag light, I'm not sure.
The extra display info isn't that big of a deal.
Another feature that might be neat would be to have the display flash on/off while boosting. That would give a better indication that it is reading boost. I'm not sure I'd use a feature like that, just throwing the idea out there.
This may have been asked already, but would it be possible to have a toggle that told it to force displaying boost anytime the car is on boost no matter what the computer is set to?