I know you don't want to put effort into balancing Twisted Treeline, but please nerf Support Items.
Support Comps consistently have a 55%+ win rate in Twisted Treeline, and that only rises in the higher divisions. Supports should have to pay a greater price for funneling all their gold and experience to their carry. A simple solution for this would be to remove GP10 from the Support items in Twisted Treeline. Then Supports would be more reliant on both their innate strengths and their allies and would have to prioritize when buying items.
Enemies would have a better chance at trying to take advantage of their early game weakness and would be better rewarded.