My ADA was a joke. She did less damage that any of the robots we were fighting. The robots seemed more powerful than any Deathclaw I ever fought in the game. Especially with rapid fire laser weapons they all seemed to have.
I have the armorer 4 perk. I have Science 2 perk. I have the Robot thing to 3. My Smith thing is only 1 or 2 and my Science perk not being up there seemed to hurt my ADA a ton.
I just had ADA distract them, hacked the strongest one and then sniped them down. I gave ADA a stealth field to help what appears to be stealth nerfs from the last patch. That probably also made her weaker than she should of been. And in the end it seemed entirely pointless. But I maxed out everything she had with armor and the most powerful damage weapons. A long range laser for her head. A fast firing laser for her left arm. And the ax for her right arm. All were the most powerful armor, damage and etc according to the mods. Sadly I couldn't give her the same super fast firing laser that the enemy robots had. So she was weaker than any of the solid robots in the run through. Honestly she seemed weaker than Dogmeat. Obviously I carried much less. She carries much less. She didn't seem to use grenades I gave her. And she didn't seem nearly as tanky or DPS as you would figure a robot to be.
The last fight was disappointingly easy. It also seemed extremely bugged out. For some reason the timer got messed up when I shot out the spotlights. Thus it kept in an endless loop of sending the eyebots, mines and explosive canisters. I actually had to play the last fight 6 times before the glitches ended. I tested the spotlights 2x it bugged out both times. Apparently the 4 month delay wasn't about eliminating bugs in the DLC.
In the end Jezebel is just a settler for me. I don't know if this is a bug, or she is just intended to be a settler after the Mechanist story. I can still upgrade her at the robot workbench. But I can't use her as a companion now. She is just a settler who whines. Just what I need another Marcy Long (whatever the name) in Sanctuary. Thankfully I can still at least assign Jezebel to the Supply Line and she is now running supplies to the Mechanist lair. Sadly it's not a settlement that will get settlers that I know of.