Yep, I linked this same video earlier in this thread. I have no idea why you replied to my post with it.
Zarya hitbox is small, and she deal a ton of damage if fully charged. Moira hitbox is large and she deal little damage. Given Symmetra new beam numbers that Geoff gave us, which hitbox size you think it will be more probable to arrive?
If you give Symmetra a Moira-sized beam, and reward precision with even more damage, her range needs to be short. Probably as short as it is today. But that would be against the argument of making her beam more viable, so it will be around Zarya range. But while Zarya need to manage two cooldown abilities with little uptime to power up her beam damage, Symmetra will only require her own aiming prowess for that, but she is a squishy 200 HP hero with no defensive ability and no mobility.
It’s a very complicated and convoluted issue, and I honestly believe that Blizzard will mess up with that balance, and make her OP in her first PTR incarnation if they don’t revert the beam idea for good reasons, plus all the accessibility issues.