Deutschland had no easy displacement left for more speed

Could Deutschland be made faster or more effective while remaining near its Versailles displacement limit?

Only marginally; every useful improvement would cost armor, weapons, range, or another feature the design could scarcely spare.

Deutschland already reached about 10,800 tons standard and 28 knots while carrying thin protection and six 11-inch guns. More speed would require giving up armor, armament, range, or another feature that the design already held near its minimum. Moving both main turrets forward would rearrange the ship without creating the missing displacement. The Reichsmarine also preferred separate weapons for specialized tasks, which made a simpler dual-purpose secondary battery institutionally difficult. The class represents the best compromise its designers selected within the treaty, industrial, and doctrinal limits of the early 1930s. A modest redesign might gain a little speed, but it could not turn the ship into a fast and well-protected capital raider.