1st - the ability to customize for individual screen sizes, pro is not mobile friendly, the responsive for mobile is not always accurate and cause you to have to choose between customizing for desktop or mobile, we should have the ability to make changes per device to make designs better and more intuitive and accurate per device.
2nd - The off-canvas modal needs to have the ability to be called from and shown from inside the row or column, like in the demo for pro, it is very cool way to display the off canvas content, but also would make the display on mobile better and cleaner. I like using the off-canvas modal for desktop, but most of the time remove it or keep it from being shown on mobile, when if we had the option to show like it is in the demo of pro, it could be used anytime and be seen on just about every device.