Vitalik tweeted there will be no rollback. As the hacker has only 3% of all ETH. A lot to be sure, but not enough to warrant another split.
It's also not really his fault either.. It's kind of up to the application developer to secure his users funds. Bad coding on his part. Has nothing to do with the Ethereum code from what I can tell. If you want to blame anyone, blame the wallet developer or yourself for putting your coins on there and just hoping.
I think the parity developer is not a part of the ethereum foundation. I like to use mist wallet. That will get an update in some period from the ethereum itself. rather than using the 3d service such as parity.
Fuck for the parity developers. Mist wallet still being the best of ethereum wallet as far as I know. The ethereum developers still actively updating the wallet. Use mist and never use the parity wallet