If you can add a good, young player for peanuts you should, if anything just for the extra asset to play with later.
We also don't have to do anything, we have quite a bit of cap space IIRC. I'm not sure what mystical thing is going to happen once all those crappy contracts are off the books. Also tanking is stupid, as the last couple of years should've indicated to everyone, and just because that may be his plan it doesn't mean I agree with it, or the execution of it. You can spin it how you like, and I'm generally optimistic, but for better or worse the off season has been rather underwhelming.
It all may be moot, as maybe Gusev had zero interest in being here in the first place. But hey, It's still probably nice to be a NJ fan right about now.