As it is now, the trait is not worth the GM status as it works only against one target at time and unfortunately there are classes that alone can create multiple targets, making the trait completely worthless.
The blind can get wasted on a clone, minion or pet, thus the heavy investment in a not optimal trait line cannot be justified.
Please re-think about the implementation of the trait, let it remain at 5s CD, but for target
Cheers