Much as I hate Lee Sin
I think he's actually an example of good champion design ideals. As well as having your basic "skill at league of legends", he also can do stuff that other champions cannot do, or at least not in the same way as he does it. This means that "skill at lee sin" is also a relevant factor.
Compared to say.... Pantheon who is purely point and click and winning a fight is typically just a matter of stat checks - do I have the damage and defenses to kill them before they can kill me, allies can come to their aid, or they can escape the fight. Even his ult mostly follows the same decision making patterns as the summoner spell Teleport, albeit with a lower cooldown and range restrictions (unless you go AP pantheon I guess? lol). The only real "Pantheon-specific" decision making he has is passive management, and even that typically isn't much more than "use stun asap after they break my passive for instant refresh", so far as I have been able to gather from watching, not being a pantheon player myself.
That said, screw lee sin, he has too much of a good thing and never has to fight a battle he doesn't want to.