Why you may ask? Well they are now updated versions to 1360 power cap with the Arrivals logo. Also they are nice rolls that may or may not drop after the event starts. Plus they are also already masterworked which is a bonus. Yes they are only 450 and not 600 rpm but still solid weapons. Disappointed to lose my kill trackers from the old versions, but that seems to be the theme going forward.
More info here :
[url=https://www.forbes.com/sites/paultassi/2020/10/02/you-need-to-pull-destiny-2s-festival-of-the-lost-weapons-from-your-collections-right-now/][/url]
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These random rolled ones will be differant nodes in the collection so no need to worry