Finding the equivalent of a face-to-face conversation is, in my opinion, one of the main communication problems (for the record, I don't think putting on a VR headset is the solution).
Working from home and working in an office have very different environments. So finding a solution that feels like the technology doesn't feel like it's present would go a long way to creating an improvement in remote work.
Another key issue, is being able to completely disconnect so that - by design - you can be separated from the constant barrage of communication without feeling worried about FOMO.
It would be great to know more on the issues with communicating with colleagues and sense of culture/community.
What does that look like now, and what would you improve?