[cashflyer]

Unfortunately, the key to many of the innovations you mention is the nuclear reactor.
Or at the very least, diesel engines.

Adding complicated systems, like elevating and rotating platforms, adds a LOT of weight. You have to displace that weight, and move that weight. How?

Are you going to try and push all that weight around with canvas sails?

Steam? As you mentioned, steam engines of the day produced very little usable power. Where will you store all the coal needed to fire them? Will you feed the boiler sea water? If so, how often do you anticipate having to descale the heat exchanger tubes?

[disclaimer: my limit of knowledge about the navy is based solely on Popeye reruns.]