What should we think about this letter from Clodovis Boff?

I'm sure you all know about Clodovis Boff, the guy who helped his brother Leonardo develop liberation theology, even cowriting a book with him about it in 1986. What some of you might not know is that he disavowed it in 2007, coming to agree with most of Ratzinger's critiques of it. His latest expression of this turnaround is in this open letter to the bishops of Latin America. https://firstthings.com/an-open-letter-to-the-bishops-of-latin-america/

What's your take on this? I still think liberation theology is pretty cool but I definitely agree with his point that it doesn't currently emphasize the spiritual dimension of Christianity enough.