Better Colorblindness Support
I've been playing League of Legends since around the Open Beta and I have mild red/green colorblindness. Ultimately it's not usually a huge issue, but I've found a couple instances where it's inconvenient or outright impacts my ability to make proper decisions in game. The latter situation is fairly uncommon as it really only comes up when I'm playing against a Tahm Kench since it the shade of red and grey used for the health bar and his gray health respectively are extremely difficult for me to differentiate. At the core I can tell they're different colors, just not where one ends and the other begins which leads to me never knowing how much health an enemy Tahm has left.
I don't know how many other people this affects, but I'm sure that I'm not the only one since this form of colorblindness is one of the most common. Ultimately what I would like to see is some additional colorblindness options that address this sort of issue for myself and others. The current colorblind mode only changes your own team color, leaving a gap for those who can't tell the difference between the shade of red and grey used readily which is compounded by them being very similar shades. Being able to change the enemy team color to a lighter shade than the grey health would resolve this pretty easily.
Hopefully we can get some traction for this because an update to the colorblind mode is long overdue at this point.