It will be interesting to see the changes in equipment and systems because the old Soviet ships had antennas and masts and equipment all over them and often looked rather messy.
The Kirov class not so much because all the major missiles were vertical launch and therefore below deck and out of the way, but they still were covered in mounts and antennas and cables and things... it should be interesting to see where they have gone with things like ESM jammers and sensors and radars and EO systems.
I will also be interested to see what sort of gun they have because the upgraded 130mm guns are single barrel light weight weapons that would probably not be suited to sustained fire like the old twin barrel 130mm guns despite being much much heavier.
This redesign is going to be interesting because the Kirovs didn't just carry a lot of weapons, they were full of electronics and were command vessels too with likely several skyscraper buildings worth of mainframe 1970s and 1980s computers... a lot of it could be replaced with laptops these days and a lot of the older weapons were rather large but have been replaced by larger numbers.
They likely need a much smaller crew and with a lot less space filled with electronics I would say they probably increased space for fuel and food and made things more comfortable for the crew too.
She will be an impressive beast.
Part of the reason they used a mixed propulsion system is because their other ships wouldn't keep up if they had to run at 30 plus knots all the way so having a dash distance of a few thousand kms is about all they needed.
Their new destroyers are likely to be nuclear powered or perhaps nuclear electric powered, which means much higher average speed as far as they like.