Why better briefing could keep battlecruisers out of the battle line

Could all the Revenge-class ships instead be ordered as Renown-type battlecruisers?

No; the larger battlecruiser force remains a distinct trade-protection and reconnaissance arm rather than replacing the battleship battle line.

More regular explanation of ship roles could reduce political pressure to treat every capital-sized warship as part of one battle line. In this account, battleships gain control of the sea through fleet action. Battlecruisers then exploit that control through reconnaissance, trade protection, and commerce interdiction. Institutional understanding therefore changes deployment as well as procurement and helps keep the two capital-ship missions distinct.