NTLMv2 is quite good, but many companies fail to create group policy to make it the only allowed option, allowing NTLMv1 to be used - which is not very good. Microsoft don't do any work on the L2TP client anymore, so I can't see them improving it. Cisco Meraki continues to work on AnyConnect, which is a much better option. Once that comes out you'll be able to move onto that and result this issue.
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