Keep your chin up sweetheart. He might not be showing as much interest at the moment as he did before, but he's been through one helluva lot and he will take time to recover. He's eating, which is good. He's responding to you, which is good. He hasn't had any further fits, which is excellent.
It's perfectly natural that you're willing him on to greater things, and I'm certain in time he'll do more and more. I know so well how this feels, because it was similar for us after Paddy had his stroke - we didn't know at first if he'd recover, then it was how well he'd recover. It was a slow process but one that was worthwhile keeping faith with. Me and Paddy are sending lots more positive healing vibes
to join those of everyone else.