Paste relative to group X/Y
Sketch has a feature where it remembers the relative positioning or XY of objects within a group. So if you copy / paste from inside one group to another group you can paste items into the exact same position.
Christopher Rider commented
This is especially harmful when the target group is BEHIND an object in the original object's location. It becomes very difficult to even move the new object to the desired location, since clicking in the original location will de-select the target group.
David Gross commented
Why hasn't this been implemented? It's a huge pain — everytime I copy from one group, and paste into another, it places the pasted object outside the group's frame! It's crazy!!!
This feature would be a big time saver!