Thank you for replying Jean, I can say now it's very easy to customize V3 texts in the front end, following the guidelines. No reason to build a new image etc.
It's true though, that if you want to make further customization and/or add scripts, need more work and skills. I'm very happy with v3, I hope the developers create a more detailed guide in the future and also integrate more languages in the default installation.
CAPTAIN ZARAKI, I have exactly the same experience, no issues at all after BBB introduced the integrated turn server (in Azure).
Panos