Between the extra health to genji, no nerfs on harmony orb, and now being able to cleanse discord with zarya (oh and don't forget some tracer nerfs), I would not be surprised to see even more genji shenanigans.
Blizzard will have to realize at some point symmetra is a clear balance issue. With her in the game, you have to balance tracer at 150 and 200 health and genji at 200 and 250 health all simultaneously. She's a pretty dumb hero to begin with, should have a complete rework done on her anyways. Harmony orb remains a problem; don't see why they wouldn't have an out of combat delay or at least diminished healing until out of combat on it. Honestly I'd prefer that on all healing abilities since it would perhaps encourage more dps-focused comps and less support stacking.