I wouldn't go that far just yet.
The good news though is that even if Christiansen doesn't prove to be our left tackle of the future, it doesn't sound like he'll be a wasted pick like Greg Little.
It's very possible that he could man the left tackle spot adequately this year but be moved elsewhere next year in favor of a highly drafted or free agent left tackle.
Tepper can certainly interfere in decisions...if he wants to be another Jerry Jones or Dan Snyder.
The most successful NFL teams have owners who trust their people. If the people prove they can't be trusted, then you get new people but you don't stick your nose in yourself.
(at least not if you're smart)