Karma's niche as a support
Compared to today's prominent supports such as Janna, Nami, Braum, and Thresh, Karma doesn't have nearly the same CC or peel as the others. So, why pick her?
I think her niche lies in her movement speed boost, her E. This makes Karma a more mobility-focused support that fills the same role as Sivir, allowing teams to work when their only engagement consists of running up to the enemy. Still, the existence of Talisman and the new Righteous Glory items make even that niche not so unique to Karma.
So what do you think? Should Karma receive buffs to her E that make her a more unique pick, or is she fine right now?
is a poke oriënted carry support. Been able to be a lane bully in the early game while still been able to become a secondary APC in the lategame. What makes Karma so unique compaired to other carry supports like 

is that her carry style is poke oriënted while her friends tend to focus more on teamfighting. Karma excels in zoning her enemies away from her & punishing the enemies that tend to cc her carry.
from oneshotting your carry. In these brackets she's more used in early & poke comps to want to get an advantage early on.
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mostly between maxing your Q & E.