I hope we'll see an implementation of the Grid system as soon as it becomes operative and gets implemented on major browsers. Existing layout methods have lots of limitations and my understanding is that the CSS Grid system is going to offer lots of new way to control page layout content, in combination with Flexbox.
This has been discussed already on the forum: https://forum.webflow.com/t/css-grid-coming-in-march-2017/36475
We're live! Check out our announcement page to take a look at what we're releasing, grab some cloneable templates, and play around with an interactive playground. Happy designing!