They indeed contacted NXT devs asking for a rollback, but it was not performed. And they managed to make a deal with the hacker, such that he returned most of stolen NXT in exchange for several hundreds BTC. They took that loss upon themselfs, no clients funds were affected, much like Bitstamp did in the recent hack.
But I don't believe they could survive this time, at least without funds being returned somehow. If it indeed was a coldwallet, there is a limited set of suspects, may be there is some hope.