For example I would be interested to see a debug mode with expandable variables and call stack, git changes highlight, flexible split layout with tabs support,

For example I would be interested to see a debug mode with expandable variables and call stack, git changes highlight, flexible split layout with tabs support, toolbars if any, terminal integration, compilation log, file tree navigation, syntax highlight on non-trivial code, popups with symbol info, scrollbars minimap, markdown rendering.