Why isn't Jax Permabanned right now? Still strong, but I am getting him in ranked

I mean Guinsoo's was "fixxed" right? Now you dont see too many guinsoo irelia's, tryndameres, w.e else was being spammed, but how do you get around fixing Jax + Guinsoo's?

I feel like if they "nerf" guinsoo's anymore, then it will just become an unused item again. But right now its like a jax only item kind of (the cho'gath video on that channel is pretty funny) And Jax WITH the item is really strong and isn't top tier strong without the item?

I hear alot of people complain, and yeah i feel like he should be definitely always be banned right now (super tanks can beat him i think) .. but what can RIOT do to fix this deadly combo??