I think the problem with Kay/o is his flashes, you can't use them for yourself. The time it takes to pop is so long that it ends up harming the one who flashes.
R-Click is far better than it used to be and it's more suitable for a quick peek. I would say L-Click is definitely something u cant use for urself, but I understand they intend for you to use it to help flash for other people rather than just urself
Left Click flashes still kinda suck I hope they lower the activation time. I also think he should get 3 considering his kit is still a bit underwhelming...