The book of essays Engaging with Lloyd-Jones has been wanting a thorough review from a pro-Lloyd-Jones vantage point. One is now available by Graham Harrison. Originally given at the Wetsminster Fellowship it is available in a slightly modified form here. It is a thorough, fair, well informed, stimulating and trenchant piece.
Bonhoeffer uses a similar phrase 'worldly Christianity'. It's J Gresham Machen that I want to line up most closely with. See his Christianity and culture here. Having done commentaries on Proverbs (Heavenly Wisdom) and Song of Songs (Heavenly Love), a matching title for Ecclesiastes would be Heavenly Worldliness. For my stance on worldliness, see 3 posts here.