Idea on how to improve Nautilus
right now your passive as nautilus is basically that your auto attack will deal extra physical damage and root someone once every 9/8/7/6 seconds, and while it's on cooldown your AAs do nothing. i personally think it should be changed so that your AA should only root someone, and while it's on CD, as a passive effect your autos should deal the extra physical damage instead.
whether this would make him too strong or not, i'm not sure, but if that is the case they could lower the DOT on naut's shield to make up for the extra damage on your autos while the root is on cooldown. that being said there i think there should definitely be more of a balance between his shield and his passive (with the change i mentioned in mind).
currently if you have no shield you essentially have no damage. gameplay wise that's extremely frustrating, because your main source of damage on nautilus is an unreliable one (ex. shield gets popped in the middle of the fight you instantly become useless). thematically it doesn't make sense either, "the Titan of the Depths", who wields a giant anchor for a weapon, is no threat when he doesn't have his shield up?