Up.

yup, why not
could be usefull

Up.

Up.

[x] Yes

obviously. For some users that connect with dial-up saving changes to see something is still wrong and editing again takes X more time than if profile changes could be previewed

Yes for me.

Up.

Open up two tabs.
One to edit your profile in, and one that you refresh after editing so you can view the changes.
Edit as necessary, until you get what you want.

No need for a preview, honestly. As you can just go back and change it how ever many times it takes to get the desired look.

Up.

Up.