The slower heavy cruiser design

The rationale for a slower heavy cruiser design would be to have greater protection. Even if slower, the minimum speed should be 32 knots. My designs are generally low, so they tend to have too much stability, before I take measures to raise the center of gravity. By shortening the hull and lowering the power, a 16-foot wide belt, 3 inches thick can be carried. There is almost excessive deck armor: 3in + 2in amidships. That's with my favorite armament for a heavy cruiser: 9-8in guns. I like the 9.2in/50 gun, as well, but it takes a larger ship.