The group resizing features are really nice in Sketch, but I find it to be more work than is worth, especially when trying to mock things up really quickly and iterate on different sizes for things.

Here's a video comparison of how easy it is to do this work in Illustrator versus Sketch (before group resizing):

• Illustrator: https://jumpshare.com/v/yf29nufLYnh82BhxBWXs
• Sketch: https://jumpshare.com/v/Km7hOdJT6m2J2p3BIc8y?b=u71wNwFotynNJj95pnTu