Certain champions vs Syndra, there isn't much room for counter play.
There have been so many times where I've seen my jungler, die to Syndra, or they themselves get killed by one.
To counter a syndra, you have to side step the stun, and dodge her Q's, then survive the ultimate.
Her ultimate is NOT a channel, so she can run away / flash etc etc.
This means to counter a Syndra, you have to chase her. But she is a champion that doesn't stop moving when she casts. Right click away, press q. Want to punish them more? W click. Stun? E (huge range)
Let's talk about a few match ups.
Orianna vs Syndra -> Your ball does not outrange Syndra's Q Ziggs vs Syndra -> low base health, slow escape --> all syndra has to do is land 2 Q's, 1 w, ult ignite auto attack = you die. Ziggs is immobile, prime target for syndra stuns later on.
If there were to be a patch for Syndra, without completely breaking her, it would have to be a passive rework. She has a superb early / mid game, why would the late game be stronger?
Or
Q radius is too forgiving, this skill shot takes no skill. Her kit mostly uses Q W to wave clear, no one should be last hitting with dark sphere anyways.
(Log into League of legends, click on Syndra and play the video for "Scatter the weak")