Would a German battlecruiser have saved the squadron?

How would assigning a Moltke-class battlecruiser to East Asia have changed von Spee's situation?

It would have strengthened the squadron tactically but provoked Britain to deploy additional battlecruisers, leaving the German ship constrained by slower escorts, coal quality, and allied numbers.

A Moltke-class battlecruiser would bring ten 11-inch guns and a speed of about 25 knots, but it could use that speed fully only by leaving slower companions behind. Britain could answer by pairing Australia with New Zealand while other battlecruisers covered the Mediterranean and South Atlantic. A later outbreak of war in 1915 would also give Britain more capital ships available for interception, including Tiger and the Queen Elizabeth class. Poor coal could reduce Moltke's speed enough for a Queen Elizabeth-class battleship to catch her. The stronger German ship therefore changes the forces needed to contain the squadron without removing its logistical and strategic constraints.