I doubt it. Since the books ended the TV show has consistently done really odd things which are always excused by the fans because of some belief that they'll pull it out of the bag later, and they never do.
I simply suspect that they just don't care about the Whitewalkers enough and think that they are a side plot that needs to be sewn up before the show can move South and tie up the Cersei storyline.
I don't really blame the show runners for how it has turned out, GRRM has written such an absolute mess that he's never going to finish it, but I think HBO (and quite a lot of the fans?) were always very reluctant to engage with the high fantasy elements of the show. My only real wish is that, if we don't subsequently get an explanation, they'd have tied up this plot line in the first season of the post-book era and focussed on the story they did want to tell, rather than wasting this many episodes telling one they didn't.