A moderate-sized heavy cruiser design with 9-7.5in/50 guns

I don't know how viable the design is, but I thought last night that I would like to try an Exeter-type heavy cruiser (moderate dimensions) with 9-7.5in/50 guns. That gives a heavier broadside than 6-8in/50 guns and probably is superior from a gunnery perspective. I know that the British didn't like the 9-gun layout, but the ship would be able to fire alternate 4 and 5 gun salvos. That should be superior to 3-gun salvos from an Exeter. The normal displacement is 9,070 tons with dimensions of 590ft x 60ft x 16.7ft. The designed speed at the normal displacement is 32 knots and not quite 31 knots at deep load. The maximum range, at 15 knots, is 10,090 nm. The belt is 3in and 16ft wide and the decks are 1.5in + 1in. The range at the normal load is only 4,030 nm at 15 knots. The normal fuel carried is 685 tons and the additional fuel carried at deep load is another 1,030 tons. I've designated the design as the GB/CA/1921d.