Given both XY and DP were formula redirects after BW and AG respectively, I could see the next series doing the same.
It seems like we have a two region pattern of experimenting in the first and then refining and moderating in the second. Often you see the same opinions issued towards ones of each pattern (eg. Kanto, AG, BW, and SM are liked for taking innovations but criticised for being rather uneven and lacking direction, while Johto, DP, and XY are enjoyed for a more consistent and fully realised storyline but also criticised for being too restrictive and running the old formula into the ground).
Battles and action scenes are seen as the first series' weak point but are praised for trying more diverse alternatives (eg. SM and Kanto's more character driven fillers, BW's competent Team Rocket feuds), while the second series keep priorities on the main events, meaning some of the best official battles and arcs but wedged in between very generic and interchangeable crap like tons of Team Rocket curb stomps and COTDs.