Heaven will be continuously intense. Made morally perfect. Our minds will grasp wonder and knowledge of God. Death means being with Jesus. Otherwise he would have no inner conflict.
Life is just as good.
He knows the Philippians need him. Therefore he feels God will keep him alive. It is not uncommon to find people without a reason for living. They simply exist until they can bear it no longer, or they fill their emptiness with meaningless pursuits. Other people have reasons for living, but no resources for living.