Thank you for your work on these The Cinnamon edition is the finest one for that desktop IMHO.
A couple of suggestions for it. Could vibrancy-colors be removed and replaced with papirus-maia-icon-theme? Ravefinity (who develop vibrabcy-colors) are "on break/hiatus" and no longer updating their themes. Using papirus-maia-icon-theme as the default would fit both with the default adapta-maia-theme and with the other Manjaro editions. Plus the sheer volume of different colour options for vibrancy-colors makes the Themes settings window slow to load.
Also could noto-fonts be included with the default install (and ideally be the default rather than Cantarell)? Noto Sans is the recommended font to fit with the Material Design of the Adapta theme. It's also the default font in Linux Mint, and while Manjaro should not slavishly follow everything Mint does, it does mean that Cinnamon is designed with the Noto Sans font in mind.
I realise both of these can be changed by the user, but think that they would improve the default Cinnamon desktop in Manjaro.