Considering that Reich won the Pulitzer Price for Music in 2009, I wouldn't say his career - a 50-year career - needs rejuvenating. I would guess that he's individual enough to decide exactly which way his musical direction should go without being driven by that motive.

I've commented at greater length on Reich in the Howard Goodall's Story of Music thread, so I won't repeat it here. But I will say this:

I always find it odd that people can't imagine there to be any value in music that they don't personally like. Surely it's self evident that, if people take the time and effort to create a certain type of music - and other people in their turn take the time and effort to listen to it - then there has to be some value in that music. We may not all see the value in that music - so be it - but you can't say it has no value at all.

One of the things I set myself to do, many years ago, was to keep an open ear and to give new and unknown (to me) music a chance. Some of what I've heard didn't, in the end, interest me; some of it stuck with me. All of it educated me and improved my musical knowledge in some way. Music, of all the arts, has meant more to me than most other things throughout my whole life, and it's always worth searching for a nugget of meaning and delight in it, wherever it might be.