So this suggestion is in two parts, but is summarised simply in the title.
- Scene/Source locking - by this I mean individual locking of scenes/sources so they cannot be moved or reordered accidentally (probably be an option in the particular scene/sources context menu labelled 'Lock'). A global lock could be useful as well for streamers who have perfected their entire layout/configuration.
- Source grouping - alternatively known as folders, sometimes a few sources in a scene are placed in a way that puts them 'together', like a fancy frame around a webcam. Similar to layer groups in Photoshop, this would provide an easy way to hide, drag or filter multiple sources together (at the same time), making a webcam and frame easy to reposition together (say from one corner to another). This combined with the newly released Studio Mode & transitions would make overlay tweaks completely seamless.