But while you said that - it is never mandatory to always chose paragon - if you RP you answer the way you want which is how i played it the first time.
Except there's absolutely no reason to role-play when the game offers clear benefits to being an extreme Paragon or Renegade, nor is there much room to roleplay when the choices you make are so binary. Even if there was no arbitrary morality system, the choices would still be clear cut and require little to no thought. Unlike Dragon Age, where I often spent minutes pondering over less obvious choices.
As for the screenshots, I wouldn't worry too much about that. They're pretty clearly from a very early build and I highlight doubt the final game will look that bad. I'm not really sure why they even released screenshots if the game is still that early.