Suggestion about kayn to be balanced
Do not buff his damage it will make him more Riven'sh he already has a great ganking tool.
I think all he needs is a faster transformation rate, as his power spike comes at a point in the game where the game might be already decided or favoring a side already, earlier transformation might be better with more range on his ultimate.
There is no need for the damage buff wave undergoing now to reach him, or he will be cancerous with high damage and utility.
My 2 cents, welcoming new ideas too.