I used i3wm for 5 years. I still miss it after switching to the new MBP 3 months ago. Using mouse to manage spaces is so tedious and wastes 2-3 seconds each time, which added up quickly throughout the day.

Do you know about Amethyst? I've been told it's not as fast as i3 but I'm a happy user.

https://github.com/ianyh/Amethyst