Multiple monitor and non-embedded form support in the IDE
Prior to Firemonkey, the IDE supported forms being able to break away from code and being able to move forms or code to a second monitor. This enhanced and reduced development. Because Firemonkey doesn't support this, the feature was removed.
At the least, there could be auto detection for the project to allow this in VCL mode. Or expand the Debug/development desktops to be VCL Debug / VCL development and same for FM.