I suppose I didn't direct my argument to the specific points of your OP that I don't agree with. That would be my mistake.
Nerfed, toned down, adjusted, whatever you wanna call it.
Sure, as I said in my response to the other person who has replied to this comment, he may not need to be AS strong.
Tired of having to worry about him along with all the other champs that need to be banned. Pretty lame that he just builds tri for damage then the rest tank which still allows him to take people out pretty easily.
You should have to worry about him, and it is healthy for there to be more "ban-worthy" champions than there are bans. Otherwise you would simply ban all of the strong champions and have a wet noodle fight.
Again, he is a diver. He has to engage, make a pick with his own burst and cc, then survive long enough for his teammates to follow up.
He is not an assassin because he is tanky. He absorbs damage and sustains through the fight instead of trying to escape before he gets blown up.
As for the others you mentioned, they may have been strong for their role, just as Hecarim may be, but they all still do what they are meant to do.