That'd likely involve sign shops etc, therefore it'd reduce the amount of player to player interaction. And, the closest you will likely come to faction shops is a faction trade guild or something.
I think for the days and nights you could just extend it. I believe on BF (BF = Black Flames ) you extended the nights and shortened the days. For the food however Varmalore lived on a string of rivers letting us make legit our entire backyard a farmland but with Blackfyre they had large fields where they had an occasional block of water placed down to grow it. So if possible I would suggest having it for places such as Riverlands, plains, and other wet places easier to grow things, has other places harder to grow things and then places like caves impossible to grow crops. Lastly ik I've asked in almost every post on your wall (in which I commented on) I've asked if I could help with lore or building, BUT if you do just ask I guess sorry for asking all e time btw and I can't wait till the servers up!
Last time the day/night cycle was only 30 minutes, I'm thinking of going for 6 hours now and crops wouldn't grow in artificial light. Wet/warm places will have a better chance in growing stuff. I'll let you know should I need help.