This started off as a fairly "normal" series deconstructing the notion of power rangers. "What would society actually look like if there were routine battles every sunday, and the invaders always lost? What would need to be going on behind the scenes to support that level of incompetence from evil? How do you arrive at the point where there is a never ending invasion?"
It seems like it has very quickly transformed into a deconstruction of some people's unhealthy relationship with media. And while that was always in the background to some degree, it's definitely come to the foreground with the latest arc.
I would probably say it's less of a series wide deconstruction, and more the topic of this particular arc. You're right that it's had hints before, but this arc has very much thrust it into focus, but I think most of the arcs have focused on de- and re-constructing concepts that are well trodden. Like Bailong broke down the exam/tournament arc concept and reconstructed it by playing it sincerely in the end, reminiscent of other classic takes on it.
I do know that going forward from this arc, D's concept of what it means to see the world and his allies in it will have been completely changed, as shown by him starting to reject the idea of "Invader" as a spectacle, rather than his previous ideas which always leaned more into the cartoonish. Which is what Chidori challenged him on during their fight - what are you really fighting for, and what are you really about?