The way Leadwerks worked for translate. rotate, scale, etc was excellent. A graphical gizmo is more than just handy, it provides graphical feedback and allows you to work faster and smarter - especially in 4 views.
Sync between all views
Terrain editing as in Leadwerks - we are missing all the really good stuff. No smoothing or eco painting. In addition, ramp, erosion and other terrain-specific tools would be stellar. Heightmap import needs to be fixed. Right now, it does not work.
Drop to floor/terrain for assets - much easier to level design with drop to floor.
Snap to object - excellent for modular kit bash workflows
Better Undo/Redo
Prefabs and/or grouping
Mike