@justin-makosky
I would always create a central store even in a one DC environment.
Imagine the following example:
You got 5 admins on 5 workstations. You want them to use a admx file for configuring gpos that hadle Office 2013 behavior.
With central store you just have to copy the admx files to your sysvol central store folder. All admins can use the same same set on policys at once.
Without central store you have to copy the admx files to the lokal store of all 5 workstations.