I don't disagree with you. I also brought up this point and mentioned it in the surveys that clamber has effectively made crouch jumping sort of pointless. I think that's why they renewed the focus on it, added some areas in the map that require crouch jump AND clamber as a skilled move.
But if I can be honest, I don't think casuals, non-pro players or players in Warzone and more casual maps will ever utilize the crouch jump. They're going to be using ground pound, a mechanic that is new and heavily advertised in commercials, is going to be used like crazy in campaigns with all the verticality,etc. I probably crouch jumped less than ever in Halo 5. Just my opinion though. Have to see how it is when I play. If it's too awkward, I may just stick with default for the LT smartlink advantage of automatic rescope while shot if button is held down.