Hello Michel,
If you were able to export IPC-356 in EE7.9.5, you should also be able to do the same in VX.1.2 release.
With Report Writer you can export IPC-356, and with FablinkXE license you can export IPC-356-B, which as you say includes blind & buried vias.
Why do you say that netlist from ODB++ is not as safe as from Report Writer? With ODB++ you have a complete representation of the design including netlist. Most fab shops can import ODB++ data now. Trying to extract a netlist from Gerbers and NCDrill would not be a safe way to do it, and in the case of using Gerbers, it would be recommended to send the fab shop a separate netlist to enable them to check the design against a known good netlist.
Best regards
Jackie