This is my playlist with foo_columns
After foo_rating has been banned, I searched for an alternative way to tag and rate my music which should be compatible with the rating done with foo_rating.
This is how I did it:
1. Installed QuickTagger
2. Configured Quicktagger to be able to tag RATING from 1-5

3. Configured Columns UI to show RATING like this

$ifgreater(%rating%,4,♥♥♥♥♥,
$ifgreater(%rating%,3,♥♥♥♥,
$ifgreater(%rating%,2,♥♥♥,
$ifgreater(%rating%,1,♥♥,
$ifgreater(%rating%,0,♥, )))))
4. Configured keyboard shortcuts to set the rating fast

This worked for me.
Now, you can set the rating of the currently marked song by just pressing 1,2,3,4,5 or 0 to your preference. Of course, you can replace the hearts with dots or anything else (just have a look at the Character Map). This tagging is compatible with how foo_tagging tags the music. With columns_ui, one can sort by rating.
It is a bit complicated to change the rating without the keyboard. Normally: Right click => Tagging => Quick Tagger => Set Rating to... => ...