No, I think they have a very good idea of what is happening for the next 4-5 years. The exact details become clearer as they get closer to it, obviously.

When a new model or a new dungeon is designed they have to start preparations a good 8 months or more before it, so to say they still don't know what is happening in 6.4 is ridiculous.

Based on the current timing, we can guess that the release schedule will be something like this.
  • 6.3 in Dec 2022 or Jan 2023.
  • 6.4 in Apr or May 2023.
  • 6.5 in Aug or Sep 2023.
  • 7.0 in Jan 2024 or a few months after that if holidays mounted up or more time is needed.