I think the context is: http://macrabbit.com/espresso/
Building it would require knowledge a lot more complicated than learning CSS. So, yeah, if you want to use Sublime Text, man up.
My workflow is switching (and copy-pasting) between CSS file(s) in Sublime Text, where I can create a well-documented stylesheet, and Firefox with the Firebug extension, where I can play with live styling. This works for me, but YMMV.
And, finally, if you are happy with Espresso, why not keep using it?