I look at them and I think, "What are those flat tops doing with guns on their flight decks?"
In other words, when I look at them I actually think of a WW2 aircraft carrier. Their surface needs some miscellaneous protrusions, or something, instead of being a long flat plane with guns set on top of it.
On a closer look I notice that the second turret back seems to have a platform under it. Making this bigger would help alleviate the flat-top look. If you -want- to do that, I mean.