It's becoming increasingly obvious that 5 rune trees are not enough.

There are 140 champions in this game and building a page for a lot of them feels like a series of painful compromises of getting shit you don't want just to get the stuff you do. On top of that Riot has to balance a large number of subclasses around these same 5 trees which is the biggest reason the bruiser problem happened. What is the likelihood of us getting a 6th or 7th tree at the least?