I'd say more options for smaller gun mounts. octuple and sextuple 2 inch guns, quad 5 inch guns and less weight costs on radio, range finders etc so ships are possible to recreate with their actual tonnage rather than loads over- as well as historical weight savings from better engine technologies they actually had so that refits can actually save weight British had AA guns on turrets- but i can only get them on Italian Guns. More towers- so i can create this H.M.S. Hood Association-Battle Cruiser Hood: History of H.M.S. Hood: H.M.S. Hood's Proposed 1942 Large Repair (hmshood.com)