Rebuilding Nassau-class battleships retained by Germany

If Germany had retained three Nassau-class battleships instead of pre-dreadnoughts, what might it have done with them?

They would probably receive new engines. Diesel propulsion and a rearranged main battery, potentially three triple turrets, are possible options.

Retaining Nassau-class battleships would give Germany ships with considerable room for reconstruction. They would probably receive replacement machinery, with diesels a possible choice if development ran alongside the Panzerschiffe programme. Possessing the older battleships might itself change whether Germany built the Panzerschiffe. Their twelve 11-inch guns in six turrets offer several possible rearrangements, including reducing the battery to four turrets. Three triple turrets would instead provide a nine-gun broadside against the original eight. These are possibilities for a counterfactual rebuilding programme.