Namin? will prefer not to say "SvN" fault unless it is really proven by eA forums that the certain SvN is unstable. By that dangerous assumption, Namin? fears that Ms. Pandora can certainly say "well let's roll back to the previous SvN. That thing never crashed and it got connection of steel." And it is true: the old SvN has far less problems than the new one.
More update does not automatically imply more stable, though it guarantees more content... stability is a potential update in a SvN, but certainly not promised in doing so~
EDIT: Odin, Thor and Homun are all part of the current SvN. It was manually divided into phases. *In theory* by updating to this SvN, Namin? can say that heRO server has all of those maps ready to go for the most part.
Updating SvN will actually mean going to Nameless Island (or in the terms of the "other cutting-edge private servers" Episode 12, Satan Morroc.)