Synn,
for me it's perfect now!
I see, that these towers are not vertical on all sides, because all the houses in front are straight.
And now the picture is strong, the towers look powerful as they are......
I have often to fight this problem when I work for the cultural heritage preservation of Switzerland.
Old buildings are never rectangular and it's difficult to find the right balance between correction and reality.
On the pictures the deformations look always a lot worse than in reality.
Maybe, if these towers were more diverging in your memories....(I don't know how these towers look in reality)
you can crop them out and make (only) them more diverging while the houses in front stay straight.....
And, by the way: I love the laundry hanging at the riverside....
Regards,
Ben