While I actually think that the song works well in the film and I wish they could have expanded a little more on the relationship between Valjean and Cosette in the musical, I think adding the song to the score as it stands now would break the flow of the stage production.
"Was uns befreit, das muss stärker sein als wir es sind." -Tanz der Vampire
What Elfuhbuh said complete with elphies middle finger :)
The thing is, besides being an utter toad of a human being, Riedel usually has the least knowledge of the topic in the room. He doesn't usually understand the content or approach of a show, and is always completely and unfailingly socially ignorant, which makes it really infuriating when Susan can't get a word in edgewise. A definitive mansplainer; it's always painful when he has female guests. I watch the show sporadically when I really want to see a guest, because it's the only theatre talkshow we have, but it would be so much better without this hateful clown in a dadcoat. (thanks ScaryWarhol)
I'm all in favor of anything that fleshes out this relationship some, but where do they put it in the stage show that doesn't stop the momentum stone cold dead?
Obviously in a massive condensation of such an epic work, lots of moments are going to be left out. The show has worked and pleased audiences for decades without the song, so this is one of those cases of not fixing things that ain't broke. If they used it at all, they could reimagine it as a preamble to "In My Life" and then cut that one down a bit. That way, they give the perspective of the passing years and the surrogate father/daughter relationship from both Valjean's and Cosette's perspective together in one flow.
I'm sending pictures of the most amazing trees/You'll be obsessed with all my forest expertise
I actually think the reprise before the wedding would be a better place to use it. Though obviously that would cause problems with Cosette's costume change.