Bring back the Oracles.
I believe the new "Trinket System" is ok. But the changes to vision items like the vision ward no longer being stealth plus the removal of oracles have made playing against stealth champions like Evelynn, Twitch, and Teemo (Plus his Shroom Fields) almost impossible. The point im making is that the sweeping lens just doesn't cut it when you play against these champions and leaves you almost helpless in your play. P.S. Thus really makes Evelynn one of the most OP champs. Bringing her almost to her season one strength.