Originally Posted by Vuther
That's why they removed it, though. It completely stripped away the advantage of a few champions.
Countering evasion (and blinds) isn't much different from countering stealth though - and there are 6 items in the game to counter stealth. Or countering Mordekaiser or Malzahar with a Quicksilver Sash. Or countering Fiora with any armor item that punishes auto-attacks ever.
Beyond that, countering 1 mechanic hardly strips away the advantages of a champion. Not to mention some champions have to put up with all their mechanics having counter-build options (Vayne largely deals physical damage so stacking armor counters the majority of her damage, granting stealth detection counters her anti-aggro ultimate mechanic, building attack-speed reduction mitigates her true damage, applying on-hit slows can largely negate the distance her gap-closer allows her to cover, and building tenacity reduces the duration of her CC). Even with all that Vayne is still a solid champion, and the fact she has so many mechanics makes it hard to completly shut her down - the same can largely be said about Jax even if his counterstrike doesn't give him a rank 1 Kayle ultimate (and it still has a hard CC effect attached to it). Both Jax and Teemo deal a considerable amount of physical and magical damage for that matter, so counter-building that isn't particularity a walk in the park. The both also have access to strong CC and high mobility - so I really doubt being capable of counter-building 100% accuracy loss would hurt them all that bad, or worse than the majority of champions out there. Also, item counters have this whole deal were you actually have to buy the item to get access to the counter - and such items will not mesh with optimal builds more often than not.
If nothing else I'd like to see counter-options for modes were certain champions are broken - Daruis really deserves a specific counter in Twisted Treelines, and Jax deserves one in Twisted Treelines and Dominion. I wouldn't call Teemo broken in any mode, but he's annoying, and several items can hard-counter other champions a lot harder than what he generally has to put up with, so I don't see it as a problem for him. Maybe Heimerdinger, as he's in a bad spot right now, but if he lands that grenade it's a stun anyways - so item actives aren't gonna help you out there.