Gather Comprehensive Hymnal, Second Edition
The Short of It:
If you liked the green book, you'll like the red book. If you didn't, you won't.
Seems like a bit more hymnody than before, but nothing approaching the (optimal, IMO) blend found in RitualSong. It also appears to be lighter on OCP content this time, and I was surprised to find that psalm paraphrases still abound in the psalm section. Given the anticipated directives of Liturgiam Authenticam, I was expecting to see the paraphrases moved in with the hymns, and only exact NAB text remaining in this section.
My new parish uses nothing in the pews, and only "Lead Me Guide Me" for the choir. That's unlikely to change. I will soon begin subbing at a second parish - this one uses the green hymnals. Not sure yet if they're planning a change.