Tallima: Just you the player. :)
There are lots mods for it to make it more complex after you get the hang of it.
Trentonlf recommended me this one:
http://banishedinfo.com/mods/view/679-CC-Excellent-Adventure-BlackLiquid It adds a ton and quite seamless and well-done.
iscagog: Yep - have just downloaded that mod. Glad I mentioned it now, because the colonial pkm might make me fall in love with the game again :)
I would still not play it until you have at a very minimum completed the tutorial and played it for a little while. I started a game with it, but I decided I'm not quite ready for it. There's a lot more resource management. But it's quite incredible.
Honestly, if I were the Banished devs, I'd buy the mod and release it as a "Hard Mode" or "Complex Mod" DLC. It fits so well. Luckily, Banished devs aren't money-grubbers! :)