Karma Gameplay and Viability
Just a quick thought - I remember awhile back reading about a Riot employee and some karma fans talk about tuning her kit to make it more effective for playing as both mid and support. And I think this change could go a long way to making her a better pick.
Make karma's q and empowered q so that either the middle or back edge of q stops when it first hits an enemy rather than the front edge. In other words - if karma lands empowered q to farm the melee minions, the rest of q would travel so that it would hit the caster minions behind them instead of stopping short so that only the front 1/3 of q is damaging enemies/minions. In a bot duel, this means the adc can't hide directly behind the support and avoid the q either - they'd both get hit if the adc stood TOO CLOSE behind their support. Thus she would have better waveclear/farming/pushing/harass without ever adjusting actual stats.