I don't think a funeral is a time to go into a full-blown religious sermon. People are paying their respects to the deceased and a lot of those people will be of a different religion or atheist. You don't fish for souls by throwing an anchor at them.
When a Catholic is buried it’s all about sending him off to the Lord, not about his life here. Family will get up after the service is over and before we leave the church for that. Church services are always about God in a Catholic church, not about self.