Mages now shred towers

So in the mage update, riot added something so that mages now deal addition damage to towers with their auto attacks scalling with their AP. I understand the idea, mage auto attacks are weak, riot wanted to make them stronger. i get that... except it is a terrible idea. Part of the trade off when you pick an ap champion is supposed to be that you just need to accept that your autos are basically useless. Mages are supposed to get the benefits of having abilities that deal more damage and have better utility and attack damage champions are supposed to have abilities that arent so heavy, but they can conveniently use their auto attacks whenever and expect a decent amount of damage to come from that. That is a large part of the fundamental trade off between ap and ad. So when annie auto attacks now deal 50 ad + 350 ap damage per hit to towers, meanwhile jinx is dealing 250 ad per hit, do you see why this mechanic might not be balanced? Riot, please learn to balance your game a little bit better, its full of flawed logic and broken champions