When considering the event yesterday, one thing that must be considered is that CCP was deliberately going for the "Oh, shit, we're screwed - can't fight that" feeling in the event - hence the blobtastic incursion NPCs. I wouldn't realistically expect them to reappear at every single live event going on, though a reappearance at future Nation events wouldn't surprise me.
The biggest questions for me remain,
1, when will we see some measure of PvP possibility in the events (Sansha events were a bit gimped due to NPCs shooting loyalists, etc...), and
2, how will CCP respond if someone throws an unexpected wrench in their works? As Victoria said, what would have happened if the freighter had been shot at, or destroyed? For that matter, what if someone had destroyed it, held the field, and made off with the contents (possibly including the good doctor)? I somehow doubt "Doctor attempts defection, is kidnapped by random capsuleer pirates, held indefinitely" was the angle they were going for...