Unfortunately I completely agree with oobujoobu
But I really think a voice coach would fix his problem. His voice is still powerful, it's just me needs to get it under control again. I feel he's breathing wrong - his nose sounds blocked when he sings now - and I think he is screaming from the "wrong place" - I really think its resolvable - well - to an extent. I don't think it's 100 % age - listen to Little Jimmy Scott, Tom jones, and more stomach turningly Engelbert Humperdinck and Cliff Richard- all in excellent voice and older than Paul. I think some training and a touring break will sort it. As I clutch my straws. A break helped before - he was a disaster at Glastonbury but gave some amazing performances in the subsequent tours...... Argh! This is quite sad!