When we release 3CX v11, we'll also release the VAD version 3.0. That version will allow deploying projects to 3CX v11.
Your VAD project will not require changes to work with v11. You can develop you app with VAD version 2.0 and when we release the version 3, your project will work with 3CX v11.
But with the VAD 2.0 you will not be able to deploy your project to 3CX v11.
If you need the VAD version 3 for beta testing, send me a private message and I'll send you a download link. Have in mind that it is not a public release yet, it is for beta testers only.