Excellent appoinment for villa, IMO.
He's experienced, knowledgable. He's managed in the premiership and did all right, he has an abundance of knowledge regarding young players, he's not afraid to venture outside the English market and his Lyon team played good football and played well in Europe.
He's a cut above o'neill and the likes of redknapp and moyes so if Lerner is patient, houllier, age and health related issues permitting, will be very good for them.