Mobs are spawning in very well lighted areas under vibrant visuals.
No other graphics packs are applied yet since the upgrade to VV mobs have been spawning everywhere that previously was mob free due to illumination by lanterns, torches and other lighting blocks.
And pointing out that creepers when blowing up your builds are not returning even 90% of the materials destroyed.
Please attach screenshots of the areas with Vibrant Visuals on and off.