1. Yes.
2. Never bothered, the game is linear as hell, not so much changes in such case.
3. See above.
4. Yes.
5. a) don't get it. suicide? b) yes
Btw, I haven't played DKS yet and I wonder: can you now finish the quest "For a pound of flesh" in two ways now? Coz it was bugged/incomplete in the original.
They were rhetorical questions, I didn't expect a list of answers. And for number 2, I didn't think much would change, but it was interesting to see another scene there.
The suicide on Sentinel Island requires you to be in dragon form and to land on one of the ridges near Vacca's cave. There's an overturned boat keel with a man hanging from a room. a locked chest, a key and suicide note are nearby.