Bungie's Halo soundtracks were iconic and can be laid at the feet of Marty and Michael.
I had heard that Marty was difficult to work with, but it's crazy that you wouldn't try to retain the talent that got your brand to live in millions of people's heads rent free.
Even stranger from Sony's perspective. If you bought an expensive race car and the first thing you start doing is throwing away the expensive parts in favor of cheaper ones, you no longer own a race car. You own something that looks like it, but can't perform.