There is not a lot of news on V13 on the forum here, compared to some other groups. That is mostly because there is a dedicated external E-M35 board where a lot is posted. Since it might be of interest to people here also I'll try to post important updates here also.
As for recent developments: A while ago a second important subgroup of V13 has been discovered, next to CTS5856: PH1246. Already a lot of people have tested positive for it, including a lot of Balkan samples.
Very recently a sisterclade of V13 was discovered, for the moment it contains a Saudi and a Sardinian (apart from them also a few L618* are known)