My favorite (or un-favorite) is what the new Episcopal Hymnal did with that great old Sacred Harp mainstay, "Wondrous Love" (No. 159 in the SH for those of you who have the book). The old Verse 1 included a mention of "to bear the dreadful curse for my soul", and the old Verse 2 "as I was sinking down/beneath God's righteous frown/Christ laid aside his crown for my soul, for my soul."
Much too negative for modern liberal churchgoers - they cut and pasted verses 1 and 2 to remove all the offending bits, and they don't even rhyme any more.
BTW, Desdemona, the old-time Sacred Harp music is country, and it's Evangelical to a fault, but by all the saints and the twenty-four elders it is MUSIC! Difficult to read, usually four part SATB with the melody in the tenor. One of the hallmarks of the style is that each part can stand on its own as a melody, another is the fugue setting of the chorus in almost every hymn.
What amazes me is that you can go to some little country church and find people singing this stuff and singing it WELL. A lot of folks seem to be stuck on fortissimo, and there isn't much tempo variation (conducting is traditionally done with a sort of sideways straightarm salute, and it looks like hanging wallpaper to me) but it's incredibly difficult from a technical point of view. Plus, most of the folks who sing it read sol-fa rather than staff notation.
Get the book if you can (there's a guy in Bremen GA who will be happy to sell you a copy - they're cheap) and find a copy of the recording "Rivers of Delight" by the Word of Mouth Chorus to listen. It's another planet, but it's a fun planet.