Title. Its not enough that he heals for nearly full damage dealt on a spell with an extremely low cooldown that allows him to dash AND become uninterruptible?
He is biting. With his teeth. Why is it dealing magic damage? JUST for the sake of being impossible to build against?
Jax is THE hybrid champion. His gap closer deals physical damage, even if he builds full AP.
He is biting. With his teeth. Why is it dealing magic damage?
Real Life Logic =/= Gameplay Logic
Thematically, I think the idea is that it's a life-leeching bite so it's not just a dog taking a bite out of you. Teeth chomp and restore his own life force through what is assumed to be magic.
Balance wise, he's an autoing champion. Not only is armor equally effective versus autoing champs, it also has specific items tailored to that type of attacking. Ninja Tabi, Thornmail, Frozen Heart, Randuin's omen all have extra damage reduction effects on autoattack-AD as opposed to spell damage AD.
I don't necessarily agree with it on Warwick specifically, but auto-champions tend to have some way to do a bit of extra damage past their simple rate of DPS. Tryndamere has 5 seconds to deal extra damage as well as free crit, Master Yi gets double strike, steroids and true damage, vayne the same, Olaf gets increased attack speed that scales in battle and steroids, xin zhao has guaranteed crits and armor reduction through autos (Sort of) and guaranteed heals with autos, etc. Point is, auto-based champions typically are given ways to deal extra damage due to the fact that their are more tank stats available to counter their damage specifically.
He's a hybrid damage champion, so it's intended that he's difficult to build against. Though a decent mix of MR and armor that slows attack speed would work against him defensively.
3 champions, allowing those that like Hybrid Damage Dealer to prettymuch go to any lane and do their thing.
Thats nice right? I don't see the problem.
You can buy 3+ swords to boost MF's damage. There's at least 4 AP-boosting swords. Your point is what?
How is that hard to build against? You build a single MR item, and since he can't build 
due to his low AP scalings, he can't deal with the MR.
Literally his biggest weakness is that his mixed damage makes it harder for him to build pen. . . Have you ever even played WW. . .
Jax is currently the hybrid champion. I hope that changes if he gets a VGU. That eggplant can't have a proper life in this game until he gives up one of his strengths.
