I agree his passive could be changed to something that's actually more of an actual passive. But if they buff him there they will have to nerf him in other areas, he is not exactly UP. He is one of the best top laners and early-mid tanky dps in the game. If he doesn't carry that domination through and finish the game somewhat early he does end up falling off a little more than other tanky dps but it would be hard to change that without just making him OP. I guess the old less base, more scaling situation but you'd say bye to your amazing early-mid game. Which imo is his main niche and reason to pick him over the others in his class anyways. Unless you want him to really be exactly like Irelia.
its funny you bring up the less base, more scaling because the change that made him what he is today is when they guinea pigged him for tanky dps changes by increasing his base damage and reducing the scaling on his abilities. he was fine before that change imo