I forgot that Syndra has a passive.
I played a few games of Syndra, saw the Champion Spotlight to learn more about her, then realized she has a passive. I hadn't even remotely noticed it while playing and it had pretty much zero impact on my game. It can't even take any effect until level 9, and even then it's just 15% increased damage on Q against champions. "15% is a lot" At level 9, and Kassadin gets a 15% passive at level 1 (not saying he's strong). At level 13 the low duration on her E is increased by 33% and at level 18 the width of her W is increased by 50% (I reach this about once every 3 or so games). She doesn't even have a passive, really.
As for a replacement ability, I'll get downvoted if I suggest anything so I'll keep quiet.