Close formation in a Phenom at up to 30 deg AoB I can understand. More than that is just risky showboating.
Oh dear me! Where does your hard 30 deg AoB essential trg / showboating cut-off come from? Not sure if you've done much airborne instruction BEagle, but if we use your hard 30 deg limit for students then that means they'll be operating to their limit during, say, a routine pairs departure or radar-to-visual recovery. Surely wiser to expose them to slightly wider limits when specifically manoeuvring so they're back within a more comfortable zone during departure/recovery.
In addition, I'd want to know that a Phenom QFI doesn't have to break-out every time he takes control and the bank gets to 31 deg! I'm going to want him to be able to cope reasonably well at say 45 deg AoB.