There are way too many story threads in Act I and most of them aren't really justified. I could see it if they made Armand more of a... sort of Javert-type. If they want him to be a foil for Lestat, though, they have to give him motivations that make sense other then spitting, lathering evil, because I have to believe that even vampire villians don't do things purely for the sake of being randomly evil. (It's totally not Drew Sarich's fault, I rush to add; he can't help the way his character is written.)
I could see Nicholas having a point in establishing how Lestat's bad choices drive people away, but as it stands now, he's just one more confusion in the muddle of Act I.
'"Contrairiwise," continued Tweedledee, "if it was so, it might be; and if it were so, it would be; but as it isn't, it ain't. That's logic."'
~Lewis Carroll