I have been using a combination of wrapper and navigation components to create buttons since before man walked the earth. It is actually a pretty quick efficient way to get various button styles with different background, font color and border radii. The problem is that I am using the awesome deck component in the unified builder more (thanks for the deck component, BTW). Wrapper + Nav components are more easily customized on the fly for font color. They also offer vertical and drop down configurations.They don’t have context, however, which prevents me from using them as buttons in the deck component.
Buttons are great, but they are hard to style independently from one another. So If I want one big red button and one small green button, it is hard/impossible to accomplish with CSS (Per another post I made yesterday). The also don’t have vertical or dropdown options. 
Thanks for all your work!