For the 1933–34 Kangaroo tour of Great Britain McMillan was named as captain-coach following Herb Steinohrt's withdrawal.

[1] McMillan's opposing captain and fullback for the 1933 series was British rugby league legend Jim Sullivan.

The Andrews' reference reports that when the two had met earlier in the four Tests of the 1929 series some critics rated McMillan's performances as superior to those of the extraordinary Sullivan.

Whiticker's reference suggests that McMillan revolutionised Australian fullback play and quotes rugby league scribe Tom Goodman:.

He would make daring bursts from his own goal-line, he exploited the "scissors" move with team-mates, he used the punt sparingly but skillfully, and although he is not rated in the same heights as Churchill, as a fullback, whose defence equalled his brilliant attack, he made many gallant tackles of big menIn September 2004 McMillan was named at fullback in the Western Suburbs Magpies team of the century.