Artificial turf has been shredding athletes since it was invented 50+ years ago. It should all be ripped up and replaced by real grass. They can find a sane way to make this work.
We toured Lambeau Field last year and learned that they use a mix of real and fake grass. The field is about half and half of each. The fake grass is long, green polyester fibers, with several of them connected to a small spike deep in the soil, like 8 inches down. The real grass grows in and around those fibers and the fake fibers help strengthen the roots of the real grass.
Somehow the soil and the field drainage is set up so that they could get 4 inches of rain in an hour before any puddle would form on the field. Pretty impressive, I thought.