Optimization of employees during quarantine

My advice is don't.

You say that the current way of working isn't a problem, but that you have never practiced working fully remotely in ideal situations. But the current state for most people is far less than ideal. Not only are all of your coworkers working from home, but so are their roommates and spouses, and their children are likely out of school (including college-age children who may not normally be home). People are also likely spending abnormal amounts of time inside - they don't have access to their gyms and parks. Schedules are chaotic as people have to figure out how to take care of basic necessities.

Rather than making significant process changes, start with where you are now, identify problems, and make incremental changes. If you want to start somewhere, start with regular retrospectives and team health checks. Use these as a foundation for immediate changes to solve problems as well as longer-term organizational process improvement initiatives.

But for our company this is not a problem

How do you know? How is their ability to collaborate and deliver product value under these conditions being evidenced?