Removing 1/3 of the weapons you can reliably use against a borg is ludicrous, this is a textbook example of "I ded pls nerf"
Humans can be beaten to death just the same with a stun baton, except they have tons of other weaknesses, for instance getting peppersprayed in the face, harmbatoned, tasered, drugged, they are vulnerable to chemicals, they need to breathe, can break bones, need a suit to survive in a zero pressure environment etc.
"But you can be permastunned by a flash!!"
Well you can also be permastunned by a stunbaton, as well as it serving as a reliable blunt weapon to beat you to death with, it also can be recharged, whereas a flash is a non-rechargeable resource that has a finite amount of uses before being destroyed.