Here's the actual patch notes for those who can't see the vid:
Configuration: Sentry
Deploy time decreased from 1.5 seconds to 1.0 second
Bullet spread increased by 50 percent
Bullet spread is always at maximum (it no longer increases as the weapon is fired)
Magazine size increased from 200 to 300
Headshot damage multiplier has been removed
No longer deals critical damage
Configuration: Recon
Bullet spread decreased by 25 percent
Magazine size increased from 20 to 25
Self-Repair
Can now be used while moving
Now bound to secondary fire (formerly Ability 2)
No longer interrupted by taking damage
A new resource meter has been added that deplete while Self-Repair is active and recharges when not in use
Configuration: Tank
No longer grants bonus armor
Bastion has a new passive: Ironclad
Bastion takes 35% less damage while in Sentry or Tank configuration
Haven't gotten a chance to see the changes in action yet, but overall it looks like they've done what I would have suggested. By increasing recoil spread and removing headshots they've reduced his turret-mode DPS by a pretty significant margin when targeting heros themselves. It seems to be a pretty elegant change in the sense that it allows him to still do the same DPS as before to barriers, shields and other large targets.
I like the sentry mode changes. The suggestion I made on the boards a few months back was to straight double his magazine size in sentry mode, but incremental increases make sense.
His overall increased durabilityis a fair trade-off for no longer being a murder-machine in turret-mode.
I'm excited to see how it all pans out.