I think Karma is perfect. Her win rate in both LCS, as of today, and overall are both at or below 50%. The idea of changing her, when so many other champions need address makes no sense. The fact that Leona & Sona have above 50% win rate at all levels and were buffed makes no sense to me.
Making this change just convinces me Riot is out to lunch. She is difficult to play and I seldom find a Karma that worries me; she can't make huge multi kill plays and is best in her support role; which is at 50% win rate in LCS. Don't see a problem here.
Shielding minions? Seriously, how many champs have a no risk kill ability?
Not that it matters, but I've told myself if Riot decides to go at Karma with these low level 'issues' and win rate; i will delete the game and save myself from the grief as a solo-q Support player that enjoys the current Karma and no other champs. I have a 50% win rate overall. no great loss i suppose, but deleting game will actually be a benefit to me.