Gracepoint > Broadchurch
I just finished Gracepoint and came to watch Broadchurch. My goodness the acting by the Latimer family is horrible in comparison. The dad and daughter you couldn't tell if they were snickering or not, and the mom went way overboard. The dad seeing Danny in the examination room was pretty much just like "oh dear me sonny is dead, too bad..." and walks out straight faced.
Olivia's constant surprised frog face wasn't helping it feel serious either.
If you can watch both pilots back-to-back and honestly try and tell me that Broadchurch has better acting, I'll laugh.