For example:
> Assumptions and lack of documentation became obvious. [..] people reinvent wheel because they are unaware another team member has taken action already.
I can't see how this is related to working from home or not. If your employees aren't documenting what they do and relying on "face to face meetings" to check in on what they did, well, good luck with that, especially when teams start growing in size.
> People who didn’t come to the office missed out on things like ad hoc team lunches and dinners, discussions on the latest tech when a delivery arrives, tastings (wine, whisky, coffee, snacks, and a lot more).
Again: lunches and dinners aren't documentation tools. Missing out on snacks, wine, whisky? Really?
> Efficiency suffers. [...] there can be lags in responses that wouldn’t happen in the office.
"Lags in responses" are productive, imho. I'd rather keep on doing what I'm focused on doing right now, then answer to your question in HipChat, than be interrupted to address "whatever's on your mind".