Yes, this is what I was afraid of. I just finished it. A level 11 or 12 jedi joined me. I made sure to turn off sprint as I realised how dumb that would be.
I tried to leave some fun to him so I would throw a cryo grenade at the big bots and then pulse them while he sliced away at them. The tough part is with the regular soldiers, they died so fast. I tried to just limit my shots to hammer shots, but habit took over. I think he had a good time.
Funny enough, he said he had done it before but he did
I have to say it was pretty slick. Quiet a few different paths could have been taken for the story.
edit: oh and it did take us a while to figure out how to do the bonus. Didn't realise we both had to work at the same time. I don't think you can get your companion to do it.
2nd edit: I was too embarrassed to mention this, but I actually died during the operation. I don't think this is to spoilery, but we had to jump down a shaft and I missed the last platform and dropped to the ground and died.