FY, I agree with your approach. I cannot badger or coerce my W into paying more attention to our D(s). Just the idea that I would have to makes me sad. I did mention to my W yesterday in a casual way that D-12 seems sad and if the W could try to speak to her.
I have actually been taking what I learned from the book Five Love Languages (5LL) and applying it to my D(s). I make an effort to touch them, hug them, and so forth. Compliment them, and the other 5LL too.