Discharge you from hospital or discharge you from ICU?
If he is breathing up on his own, you could quite easily move to the wards. It would be more calm and relaxing for everyone involved. Being in ICU is stressful and awful.
They can't discharge you from hospital if he isn't breathing up and feeding, that would be negligent.
Monnie, don't let them push you into anything you are uncomfortable with. There is no harm in requesting another opinion and there is definitely no harm in asking question after question until you fully understand what's going on.
I tell my patients and their families if they can't get an answer they understand, to ask the doctors to explain it to them "as if they were a child", it sounds awful but it makes them take out any medical jargon and put it in the most basic forms.
Remember doctors generally give the worst case scenario but your little man is a battler, he has come so far already.... Breathing unassisted, opening his eyes.... Doesn't sound like he has any plans to give up soon.