I'm not sure if crowd control is ever a factor. I can say that nobody uses it up through expert roulette. In fact, in the level 60 dungeons, people are often chomping at the bit for larger pulls. There is some highest end content I haven't touched, but I suspect CC is ignored there as well for the sake of AoE efficiency.

Mainly CC is used for PVP, soloing, and in chaotic times where things are going to crap. FFXIV is very forgiving with mob damage. Outside of double+ pulls and tank busters, healers can usually spend time DPSing without constant watching your health. It isn't like WoW where pulls often have to be strategic with specific mobs CCed.