Yeah lot of it would be "scripted". But at the same time if he was emotionless or not giving any of the girls anything throughout, then the show wouldn't survive past week 4, There would be more not accepting a rose than accepting, cause no one would be feeling that "feeling" or "connection" being returned.
In real life I think you need to show someone you like them at some early point otherwise they will move on, I know I would If I liked someone, let them know, and got zilch back. And after knowing them for a bit I can work out if she is for me, or maybe not.
And its possible to create feelings for multiple people. Remember the Bachelor isn't normal dating one on one style. I could easily fall for Lisa, Sam, Louise and a couple of earlier ones who were let go (not Laurina nor Amber, lol) at the same time in that scenario. And I think Blake has genuinely given a lot of the other ladies a genuine opportunity for them to like him and for him to fall for them, and after knowing them a little by little he is able to iron out who he doesn't want, ruthless sure, but 25 doesn't go into 1. I think Tim was ok too In season 1.