They would also be the first "All Big Gun" ships, which would then forever after be called 'Conecticuts'? Especially if the US sped up the building process to complete it before UK's Dreadnought.
Not sure that my ship is a much a break from the past, it does have the much more powerful armament 8x12' (and 10x7') but its not just big guns and doesn't have turbines so may not be regarded as such a big jump ? (even if in combat power its much more than a predread)
The main problem I can see is the recoil of the 12" in the upper storey. What it would do to the turret as a whole - knock it off the training rollers?
Would it not be ok as long as its designed for the forces at the start ? (and I assume you might fire 1/2 salvo's anyway)
The double storey turret would also have the effect of keeping the armoured belt much shorter.
Yes it does give a very nice short citadel (especially if you combine it with AON and reduce the secondary guns) and as long as you are willing to give up on making it float if all the parts outside are flooded (but I think that's a big jump for the date) so maybe just more space for engines ?