Ivern Buff/Tweak idea.
So Ivern has got hit pretty hard by removal of Tracker's Knife and the lockout timer on Frost Fang. He is meant to be a support and one thing he always did very well was deep ward and steal enemy camps with smite+passive. Now he really can't ward effectively and if you do keep trinket to ward you can't sweep and clear vision, which is another thing supports thrive at.
THE FIX!!!!
Change Brushmaker to Brushmaster.
You keep the creating a bush mechanic the same EXECEPT for if you place the bush in another bush. If you do this instead of stacking 2 bushes you create a warding creature that "scouts" the bush until it is found/or destroyed. It'd be funny the little "Bush Creature" ran from enemies and dodged skill shots, but obviously couldn't leave bush. (envisioning a cute little plant creature darting around the bushes lol)
This is kind of out there, but I feel like it fits his theme and gives him a unique support ability to differentiate him from the other jungles in the game.