If they were removing the toolbar it would be gone completely.
It looks more like a wip toolbar panel refactoring gone wrong, considering they’ve nuked their own toolbar panels too.
Relying on the EFB as the only interface for flight mode apps would be a big step backward in UX as well, for reasons explained above and more. Not to mention the UX issues within the EFB itself. It’s a nice tool, and will get better as well, but right tool for the right job applies when enhancing the flight mode with extension apps.
I suspect it could be related to VR improvements wip, as there seem to be some in the beta, at least from my testing. Issues aside, it’s a better VR experience than before, so there’s some progress too.