I don't think everyone will be "crammed" back into the cubes. Alternating weeks will lessen the number of folks.
More importantly, after all the RIFs, there will be a lot of room. In my case, I will be the only one on my row. That is, of course, until they realign sites.
I understand that most work well at home and actually put in extra hours. Just can't say that holds true for everyone. I know a team I work with have folks that have a lot of appointments.
And I know responses will be that those managers should handle those situations.
As stated in other posts by others HON is clear that they want folks to work at the office.
Each person can accept that or not. Freedom of choice.