Put stealth wards back in the game already
It's what made league of legends so tactical.
I can't tell you the amount of times I'm tempted to buy a sighstone as a mid laner or top just because how important vision is. Many times i think damn my trinket is on CD and i can only place one pink that is visible to anyone.
Of all the things you changed (even mana pots removed) this one is by far the one that could ruin league of legends.
It's starting to give the game RNG which is what a professional game shouldn't have much of. Why RNG you say? Because if your trinket is on CD you cant buy a ward so walking into darkness is pure luck that there isn't an entire enemy team waiting for you. Supports are back to the "i ward for everyone and no one else should buy wards" since it's no longer possible to buy anything but pinks. Split pushing is almost impossible without vision.
I'll keep playing league for fun but damn this change really fucked up the game and for absolutely no reason at that.