Kerberos is preferred to NTLMv2 as a method of authentication. Where NTLM is required, third party plugins have been made available on plugins.atlassian.com that enable Kerberos and NTLM, and can be found here and here. These solutions are in use by many of our customers and are working well. NTLMv2 support not be in the long term roadmap for Crowd, and we're spending our time and effort improving Crowd to be more scalable, reliable and fast!
We've decided to close this issue because we feel that by leaving it open, there's undue expectation that the issue is being actively worked on, and we don't want to give you the wrong information.
Atlassian Product Management