Looking at the view from the cockpit of the Phenom it is hard to see how you would teach ab-initio formation but apparently Ascent cleared it as suitable. I don’t know if they are reviewing things in light of recent events.
I wouldn't be surprised if they are reassessing that.
At least they have spares if it's just the tip, take it off the good wing and fit it to the other aircraft
I agree with what has been said re the HS125, built like the proverbial, and a proven type in RAF service.