Karma is, by far my favourite champ, always has been, ever since I joined in February 2011.
Quite coincidentally about two weeks after Karma had been released.
I like her spam casting style, her role in a good coordinated team and the mechanics of her abilities.
I honestly don't think she needs a rework. Perhaps just a buff. And some well needed community attention.
Unfortunately she doesn't seem to fit into the current Meta as, I find, she excels most with close combat champs like Xin and Kennen.
See, the problem is she's labelled as a support, and she's a good support, but she needs a team to know how her abilities work to be most effective. I find she's more effective as an AP mid due to her sustainability and farming potential.
So I would call for a Karma appreciation week, perhaps two weeks from now. In which I would like to see 2 Karmas! in every game. People should learn how to play her and how to play with her. (So much Pun)
But, yes, come out in support of Karma and show how effective she can be!