Actually, I'm going to append a disclaimer to my previous statements. I know you COULD do all of that (in item 1 and 3) a year ago. I've actually not had to do anything like that in a long time so I cannot confirm that, that is still the way it works. I don't see why they would have changed it. I know I did a LOT of jumping between low level jobs a year ago. So there were a lot of crossing quests between different classes depending on what I felt like playing at that moment.