Before yesterday's patch both of these exotics used your equipped barricades cooldown. 38 seconds for Rally Barricade and 48 seconds for Towering Barricade. Now they only use Towering Barricade's new cooldown of 70 seconds even if you have Rally Barricade equipped.
Since this was not mentioned in yesterday's patch notes I'm hoping this is a bug and not an intentional nerf.
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I mean there was also a massive stealth nerf from Ghorn that made rocket damage worse for all legendary rockets