FitzTheRuke
Legend
By the book, no, surprise clearly does not apply. But if you don't like the way the book handles it, adapting the surprise rules is one solution. (Myself, I think it's veering too far the other way--I want the instigator to get the first blow, but I don't want to give them a whole free turn, and I certainly don't want assassin rogues to turn every negotiation into a slaughter in search of that sweet autocrit.)
Yeah, one of the problems with using Surprise in Maxperson's scenario would be that there is a good chance that knife-thrower would go twice before charge-guy, which would be at least as bad. (I would argue worse).
Sometimes it's best to just let the basic rules cover things and suck up the little inconsistencies.