Syndra nerfs aren't even touching the right thing.
TBH, I hardly have an issue with her ultimate's damage, and you guys are barely touching it anyway.
Nerf her E in some regard. If she misplays and doesn't hit a sphere, she shouldn't still get a disengage with it.
You could also remove the 'multiple sphere' gag you added to her W, or reduce stun time for each sphere launched by her E; maybe by number of targets hit.
Her combos are currently too easy to pull off and currently far too rewarding for doing so. Touching her ult damage, especially the love tap you're giving it, won't fix anything until you make it useless, which nobody wants.
She was fine before the MYMU. You guys made her an issue.