Later? Really? Dracul was my first unlock. So early I forget where I was.
Not possible; Dracul has always required Glowing Guardian to be unlocked first before he appears.
I think the earliest he can appear is the Eastern Tundra, and the probability rises as you go deeper. When I first ran through, his probability of appearing was very
small and I had to play Halls of Steel about 30 times before I finally got him.
Hm. The Wiki says Ick Swamp is unlocked by beating Southern Swamp - which I've done with four classes, including all available quests. No Ick Swamp, though.
The dungeon order has been changed. Ick Swamp now requires you to beat Hexx Ruins. After you beat Hexx Ruins, you will eventually stumble upon a naga war party that issues you a challenge, unlocking the Ick Swamp.