The theme of Hebrews can be seen as "Jesus is better."
1:1-4 Better revelation
1:5-2:4 Better than angels
2:5-18 Better man
3 Better than Moses
4:1-13 Better rest in him than that offered by the Promised Land
4:14-5:10 Better High Priest than Aaron ...
7 Better priest and better covenant
8 Better covenant and ministry
9: 1-10 He officiates over a better sanctuary than the tabernacle
9:11-28 Better and a better sacrifice ...
10:19-39 Better access to God through him ....
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.