For example, his mind was muddled, I don't think he dunked into water, the man he shot was (thus the exact outfit and hood being on him when he was dead). The "resitence to training" Pam saw was likely the fact that it took him so long to kill him without any reason. The whole point was that despite all that he was made to do could still make the choice not to taek a life. Also, it didn't end when she smiled, you clearly saw him swimming for it after that in the water. What you regard as a "tack on" was what most would call good filmmaking, they tied it together without you even thinking of it and gave a more than plausible explanation of why he took that trip to America and the end of the 2nd film. People interpret differetnly, but for some reason seems as though I got alot more out of it than you did.