I think april 2014 was mentioned in the initially kickstarter project setup. I rather have them take their time and deliver a polished product. Winter 2014 means they still have almost a year to go, seems like a solid timeframe .
8 seems a bit low at first but like quite a few people mentioned it's quality over quantity. 8 well developed comapnions is a nice pool to choose from.
I love the idea of an underground city. The Dark Elf city in Heroes of Might and Magic 4 had an awesome vibe. The buildings are constructed in enormous stalagtites with bridges conecting them.
Couldn't find a closeup screenshot but this one kinda gives you an idea: