1. I know. But it's lame. I hate when people just replace a dead/exlied character with a new 2.0 version. Plus there seems to be a lot of hate for Kerwin around the island and people will still be prejudiced against the Perth name for a while.
2. I would try very hard not to, but without some time to simmer it can be hard to separate the two characters. I need a little time to let myself "forget" the plethora of IC info and connections that Kerwin has so that the new character can have a "fresh slate."
3. I probably will at some point. Maybe I'll wait until Darka falls/wins.
I think you're missing something. You can pass on knowledge to new characters (especially children) but you can change their personalities, life goals, wishes, weaknesses, virtues. There is nothing wrong with a Perth coming to Atamara, and having had his personality warped perhaps due to his family having been "disgraced" or something on AT. Could be a character seeking redemption. Or perhaps a character who feels dejected and worthless.