How would four Canadian battlecruisers and additional fleet units after 1910 affect imperial naval strategy?
Short answerThey would reinforce Atlantic and Pacific trade protection, encourage a Dominion naval rivalry, and make it harder for von Spee's squadron to evade Imperial forces.
NotesThe ships would likely split between Atlantic and Pacific bases, where they would support commerce protection rather than challenge the United States directly. The larger political effect would be inside the Empire: Australia might seek more ships to retain prestige as the leading Dominion navy. In war, a stronger Canadian and Australian presence would make Admiral von Spee's escape routes even less promising.