I feel like this year they really tried to have a foot in both camps, in that they have selected 2-3 reasonable couples with a reasonable chance of success (so they can start saying "WE KNOW THIS WORKS" like they did in previous series).
Then they have gone out and selected the most dysfunctional/undateable people in the known universe. Jess/Ines etc are Davina on steroids, no doubt there is internal briefings where they were looking for "Davina types" to spice up the show.