I'm seeing a lot of small areas of mesh missing when I try to layer clothing items. Most notably when using the Assassins pack clothing. I just tried to put on one of the coats and large chunks of my legs/pants vanished as well.

The pants are from the essentials pack if I remember correctly (colored black). Here is another angle and you can see some mesh tearing on the vest as well in this one.

Anyone else having these issues with clothes? Or if an 'official' person can reply to say that this is being looked at or is a known issue. Should I reinstall CC3? 

Just go to Cloth Layer Settings in Edit menu and click Reset Content Settings.

Thank you, 4u2ges! That worked perfectly. Being new, it's hard to tell if something is bugging out or if there's something (even somewhat basic) that I'm missing. Great help!!