Interesting about the rudder - I'd been under the impression that a single rudder there wouldn't have a lot of effect - good to get that corrected!
As I'd understood it, the Tillman designs came about because the Navy was asking for bigger ships every year, so Tillman essentially asked the navy to jump to the end of the process to save having to build the intermediate stages.
In that time period, they didn't think so much on that, A single rudder is also good to use, so long the ship have some movement. often you see picture of these old giants with tugs around them, assisting them up to some knots...
it's first when engineers starting to experiment with things that can improve the ship control, first then you will see ships that have ruder right behind the propeller.
Fun fact. Oslo class had a single propeller, but a twin ruder on a single ruder coupling, it give better ship control at high speed (Oslo class could do 30+knots, with combat propellers), but when going in to harbor, she needed help. she had no control at low speed.