I can certainly appreciate the explanation in your second point - you're right, that would affect any being and I hadn't considered that angle. Whether it would lead to a permanent emotional change is debatable though. Personally, I think it was the writers' idea to create interest and put butts in seats. As for your first point, while accurate, I tend to dismiss Spock's early (and inconsistent) emotions as merely character development - the creative team's doing, not the character's flaws. And I don't mean that as any fault - it's quite natural to have growning pains in a new series like that.