Starfire desperately needed a nerf. That thing was so busted, and since Solar 3.0 launched. It's had plenty of time. Besides, Warlock still has plenty of exotics that are good. Verity's, Sunbracers, Rain of Fire, and Dawn Chorus especially. Also, its not like its going to be unusable or bad, it will still be a good exotic, just not completely imbalanced.
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You forgot the unlimited heavy helmet that they got this season.