>>5412715The problem with episode 9 wasn't necessarily the number of star destroyers or ships or the scale of the battle, because the clone wars battle such as coruscant likely had the same number of ships and star destroyers involved. The bigger problem was the episode 9 writers couldn't do proper cinematography, naval tactics, or narrative buildup to save their life. With the Republic and the Confederacy we had two established galactic powers who were fighting a conventional industrial war on a galactic scale, rather than just the confederacy pulling star destroyers out of their ass.
Palpatines fleet entering battle in what essentially amounts to a rigid parade formation is godawful. They don't seem to respond or make any effort to do basic battle maneuvers or spread out like they do at Endor or any other clone wars battle.
Also it doesn't seem too unreasonable to think that later in the Crusade while most fleets may operate on the singular battleship as the flagship surrounded by cruisers and their escorts as the backbone, given the increased scale and importance of a legion, that their superships like Gloriana would be the flagships, with battleships and grand cruisers as the backbone, and regular cruisers acting as their escort elements. Legions would hog the best gear and the Army Imperialis who don't work with Legions just have to settle for what's left.