I'm very quickly losing interest in the Arrow. Compared to last season, this one has been awful. I feel like the writers have completely wasted Ra's al Ghul as a villain. He had the potential to be just as compelling as Deathstroke, possibly more so, yet they've kept him on the periphery of the show for the vast majority of the season, and this whole Oliver taking over as the Demon's Head storyline seems a bit ridiculous to me.
On top of that, they've gradually made Felicity a much less likeable character, to the point where I find her actively annoying now, and they've marginalised Diggle too. To be honest, it seems like the writers are running out of good ideas for this show.