If the R44 had been flying with Armstrong purely as a passenger and the PIC had become incapacitated, does the fact Armstrong was currently suspended preclude him from effecting a safe landing using his skills, or is he expected to say 'oh shoot, guess we're going to have to die cos I cannot touch the controls as I'm suspended'?
As the most experienced pilot in that area of flying surely he was right to tag along to offer experience and advice. When he saw that the PIC didn't have the required skills to effect the rescue he had two choices, leave someone to die, or to help them. Well done that he chose the right course of action and hopefully the powers that be will also recognise that he took appropriate action.
If he had been on his own then it is more contentious, but he wasn't, he had another pilot there to help.