Anytime a theory makes a prediction that is then confirmed by observation always greatly increases its credibility as being in some way an accurate description of physical reality. The surprising thing about Neptune is that it is not bland like Uranus. Instead, Neptune shows bands and a Great Dark Spot, analogous to Jupiter's Great Red Spot. Amazingly, it also appears to have a source of internal energy. Now Uranus and Neptune are near twins in terms of mass and size.
Astronomers now think that there is 'something' which inhibits internal convection in Uranus.
Uranus has a warm interior like Neptune, but the heat is somehow trapped and not getting out. Thus Neptune has a relatively active atmosphere, but Uranus does not. Like all the Jovians, Neptune possesses a ring system. The difference is that Neptune's rings are not especially uniform, meaning that ring particles appear to be clumping in certain areas, giving the appearance that Neptune possesses arclets. By the way, Neptune does NOT fit into the scheme of Bode's law at all.