The new showrunners stated in a TV Guide interview conducted prior to the airing of season eight that this year is designed to push Clark closer to his destiny..and if you've paid attention he is having an internal struggle with himself to see if it's worth doing that. They need to tease and play around with us in order to tell stories and build up plot points. Eventualy we should see the payoff...at least we better.
You'll forgive me, I don't watch the show, and I haven't seen it for a long time, but I'm curious about this "destiny". Surely Superman isn't some sort of difficult destiny for Clark Kent - he's Superman because he's a nice chap and he knows he can help people. How much angst can the Superman character really generate?