the faenza icon theme is not maintained since long time.
The Delf icon theme, actively developed is a fork of faenza that has the propose to be the continuation of the defunct Faenza icon theme
It has no sense to maintain a defunct projet in our repos, if there is an actively developed fork, that looks pretty identical, available in many colors and also better than the original one
So, I think we can remove
mate-icon-theme-faenza packages from our repos and add Delf icon theme as a much more valid replacement