1 - Yup, the fork oil turns to snot. Mine was awful when I installed stiffer springs.
2 - Haven't heard anything about the choke plates coming off. I know it was a problem on the 600, but I didn't know of any 650's with that problem. I rode mine for a year without trouble.
3 - I honestly can't say. Whether you would actually break a conventional master link, or if its just Honda's way of covering their ass and being over-cautious, who knows. I'd say you'd have to be riding damn hard to break a master link with it.
So how are ya liking that thing so far?