I love the patch, even though it makes my play-through obsolete. No civilization ever found a place in history by being 1-city only. Even my ancestors, the Great Bulgarians, ruled a vast territory (roughly as big as Ukraine, meaning 600 000+ sq.m.) and had many big cities as staging points around 1000 B.C. - 7 if I am to be exact, including coastal ones. This very much acts as an example as towards what kind of expansion one should strive in order to ensure a place in history. I am giving a simpler example - Egypt, China, Mongolia, Japan, Rome, Byzantine, Greece and Persia that all people know of were really big figures on the world map around that time and they were much, much bigger.
I always felt OCC in Civ5 was getting a lot more love than usual. In the end - how many single-city countries can one name in the modern world???
Andorra, Monacco, San Marino, a few island countries (although 99% of them have a second city too)... Although I gotta say they look as a really appealing place to live in (high standard and such) making it logical for a cultural Civ5-like victory, lol
EDIT: Now we gotta replay the maps properly - especially as by what tommynt said in the OCC deity thread - albeit I wouldn't put it in such harsh words though