Jynx used a saying, death by a thousand cuts, earlier in this thread and that same idea works in the other direction too. Video game developers famously have insane work schedules and that's no exception for the FFXIV team; Corvinoobus gave us an idea of what their schedule is like in a post not too long ago.
One visor animation might seem like a tiny project to us, and it is, but compound it with everything else that needs to get done and it becomes a big project. Death by a thousand tiny projects. Realistically, some of those tiny projects can't get done.
Would a smoother animation be awesome? Absolutely. Are the Developers lazy or evil for not including it? Absolutely not.