SUMMARY
In Windows using FancyZones, a combination of the Meta+Arrow keys allows a user to cycle the active window between each of the zones within a layout without having to use Shift+Drag. 

It's a little bonus feature that makes the custom tiling more useful and intuitive with how it integrates with quick snapping behaviors. It also would allow for some super quick layout management using only the keyboard!

Simply adding keyboard shortcuts to cycle to the previous/next zone in a layout would work, though I know other solutions guess at the direction you want to move a window to decide which zone to tile it to, but that's a bit much for the scope of this feature imo.

PS: I love the new tiling btw. I think it's what has kept me from cracking and moving back to Pop!OS and GNOME :^)