Sym is barely a threat to Genji. She has a very gimmicky 'fool me once' carwash trap and her beams range isn't enough to threaten him, he can just chip away at her from range while she' completely helpless. Honestly I'm really excited for the rework, the teleport opens up so many shenanigans alone its crazy. Depending on the range she can help her team completely skip chokepoints and open up more fights on different parts of the map.