I'd probably get rid of Last Cave, and keep Alantis or the Temple of Dreams just so you can have a nice quiet roleplay there. I generally don't like roleplaying on popular maps because I can't see what my group is saying. It's really quite annoying.
Last Cave: I've seen some pretty naughty behavior while spawning there from a recent roleplay with my sister. Yeah... I had to leave immediately and almost got banned from the game by my mom. Last Cave is pretty useless, and I always have to have someone show me how to get there, since I can never remember. So it's not like I use it that much.