I don't have experience so I'm just speculating.
It doesn't seem like 1 should be a big problem. Maybe teams run uptempo press/fast break and require 12 deep. But, to me, 11 deep is probably plenty. So, if forced to sign one "unplayable" guy, it shouldn't be a big deal. 2 doesn't seem to be the end of the world either as you'll only be giving minutes to one "unplayable" guy and everyone else will be in the same boat in the same river. I believe the days of 3-6 EE will end soon enough. Teams just won't be able to recruit the "super class".
Now, as I understand it, you're not penalized for cutting a walk-on. So, and I'm trying to learn, if you have 1 expected EE, isn't the best strategy to go all in during RS1 and RS2 on one playable guy and hope to win a VH/H battle? That way, if you lose, you get your walk-on, let him sit the bench, rescind scholarship and repeat the process?