While I would like them to fix Bastion, I don’t think this is a good way to do it. This would just increase his reliability on teammates without fixing his core issues with Sentry mode. His spread is too high for a stationary hero leading to pretty low damage numbers (source), and he’s encouraged to stay in Sentry mode for too long. He should set up, get a pick or two, then relocate, not just sit in one spot forever because he can just eat the damage…
In my opinion, his passive damage resistance needs to be removed entirely. Bastion doesn’t need more survivability in Sentry mode, he needs more consistent damage. He needs his spread either reverted, or to copy Hammond’s spread pattern.
My most preferred way of fixing him is this. It removes passive damage resistance and replaces it with a new form of Ironclad that allows Bastion to overheal himself with extra “torb armor” (the orange armor that torb can currently toss out on live) that stays until damaged away. He can only do this while at full health, and healers can’t heal it, which reduces his pocket-ability. It also fixes his Sentry mode weapon so that it feels more consistent and reliable.