Thing is, ive always dealt with Sirens by just blasting them in the face. Boom, their WP are gone; their mind control is gone and youve dealt it a great deal of damage. Later on I noticed dazing removes mind control as well. When I found out about that I sometimes hit them with an Hel II or the phoenix point caddle prod thingy to daze them for the same result.
Fact that you can just daze it with the Neural Disruption to disable the mind control as well doesent make it OP, it means the player has options.