Can I just ask why references are not put in the infobox, although I assume this came from one of the books.
It is broad in its coverage.
a (major aspects): b (focused):
There isn't a vast amount here, when compared to some articles, but I can't see anywhere the article is seriously lacking, considering there is the main article
Imperator Aleksandr II class battleship which contains most information about construction, design etc, so that level of detail is not required here.