Lancome it's one of the strongest beauty brands in the world (if not the strongest?), and their main goal right now it's to make the brand more youthful and playful for younger audiences, thus the integration of Zendaya and the use of Taylor Hill with more peachy colours, I doubt the rénergie shots will get much appearance in the public eye.
You must take into consideration each franchise, and analyse it in its own, and not as a brand. Rénergie, even though the pictures are not stunning, they are products catering to an older audience (even though I agree Kate Winslet shots are not stunning, they probably connect better with the audience than a really stunning picture). I really like where they are taking LVEB with Julia Roberts, these shots continue the storytelling and giving at the same time a breath of fresh air.
Lastly, they must be doing something right, since their performance is getting stronger than ever.