I just realized that Karma's Passive is Problematic...
http://www.mobafire.com/images/champion/icon/karma.png
So Karma's passive makes Mantra's cooldown go down every time you damage someone with auto attacks or spells. It lowers the CD of Mantra extremely quickly if you use AoE spells. With her shield's AoE damage gone, the only and quickest way to get mantra back off CD is using Mantra-Q. I think this in itself is problematic. It makes you only want to cast mantra Q so you can get Mantra back off CD quickly. I think the other Mantra spells need to be just as efficient at lowering Mantra's CD, or the entire passive should be rethought.
The new Mantra E is 100% unbeneficial compared to the old one regarding her passive. Every mantra spell reduces CD aside from that one now that the dmg has been removed. Might be nice to have it looked into. Maybe have shielded targets reduce Mantra CD as well. It'd help support Karma.