I'm sorry to say this but I am abandoning any GTK3 theme making from now on. Upstream is impossible to work with and GNOME 3 has become a complete mess in regard to third party theme making. As if GNOME Shell isn't bad enough sometimes with every version being broken, GTK3 is even worse. For those of you who wish to make GTK3 in the future, good luck, you'll need it.
Honestly, Windows and OS X actually look more attractive to me right now.
I'm not leaving dA, just pondering what customisation to do next.