Was Dreadnought an odd mix of battleship, battlecruiser, and large armoured cruiser?
Short answerOnly in a lineage sense: dreadnought battleships and battlecruisers developed along different branches from armoured-cruiser design logic.
NotesThe response accepts the comparison only as a way to think about design ancestry. Battlecruisers carried the speed-focused cruiser branch forward, while dreadnought battleships accepted more armour and a different balance of qualities. Both lines can therefore be traced through armoured cruisers without making Dreadnought a member of every category. The distinction keeps a useful technological lineage from becoming a misleading classification claim.