Lies, the DP main cast was just as good as previous ones and their interactions made sense perfectly The young competitive girl and young competitive boy acting like brother/sister best friends, while the older and more mature guy acting like a big brother to both of them
While Ash and Dawn had some nice moments, overall I found the DP trio very boring. It lacked individual funny moments as a group that the previous groups had, and Brock was the most disconnected this arc of any previous. Even the Ash/Brock friendship was handled badly in DP, let alone the "associate" interaction he had with Dawn.
This was the first group of the anime I honestly thought didn't have chemistry together. Since BW introduces two new characters, most likely the writers thought of an Iris/Dento dynamic from the beginning to make it interesting.
I doubt the DP trio as a group will go down in history as anything special.