It looks like Beyond the Flesh overrides any accuracy scaling of weapons when activated, effectively removing mindstar's unique Wil-accuracy scaling and lowering total accuracy.
However, Beyond the Flesh's description implies that this should only happen to weapons that use Dex to determine their accuracy:
"While this talent is active, all melee and ranged attacks use 60% of your Cunning and Willpower in place of Dexterity and Strength for accuracy and damage calculations respectively."
[1.6] Beyond the Flesh Reduces Mindstar Accuracy
Moderator: Moderator
[1.6] Beyond the Flesh Reduces Mindstar Accuracy
Spamming Windtouched Speed since 1.5