Yeah, I agree a main central fix on the eyelids themselves would be more than welcomed. I tested the CAS portion on a few Sims now. All were able to close their eyes for me. I tested it on some of my longtime Sims and new randomly generated sims. I do have mods though. I will try and test it out on more sims.
EDIT: Okay, it seems when I generate random sims it still works. However, when I modify a sim and pull down the eyelids in custom mode, then it doesn't work anymore.
However, before this latest update, it didn't matter which sim or modifying the eyes or not, the eyeslids wouldn't close no matter what. So, it's an improvement, but there is still much work to be done. At least their giving this bug some attention.