Sorry for the inconvenience and the section below standards seeketh not to make more mistakes in the forum
Don't worry, it might be a bit daunting at the beginning but as soon as you lose a few forts you'll learn a whole slew of tricks. There's a lot more in the current game than surviving goblin sieges, hope you discover a lot of goals for your current genned world, because we mere mortals don't have enough hours a day to play all the Dwarf Fortress we need.
As for the suggestions, they're somewhat foreseeable for the next releases, so we'll see dynamic caravans, inns and, why not, more political and social figures besides diplomats. Now that populations rely more on historical figures and their offspring, we'll maybe see some changes related to warfare.
Slavery, as said above, is a touchy topic, but it depends largely on the civilization ethics.
As for the new settlements, we're getting the hill and deep sites in the next release and they'll play that function to an extent, although we wont have them linked to our own fortress yet. Their role will extend to give us enough dwarfpower to beat foreign lands into messy, drunken submission.
Nobles are also getting more and more relevance as time comes by. Multiplayer, however, is a current no-no, but that doesn't mean we're unable to have a meaningful game experience.
Time to have varying degrees of FUN.