I was thinking about this last night and you. Hope the new day has brought some light into your thoughts.
I know that you want Jett to be normal. Every Deaf and hearing impaired person I know is normal. One is an Olympian, a few are lawyers, two have received medals of the Order of Australia. My mum is national president of Deaf Australia, the peak advocacy organisation for people that use AUSLAN in Australia. Some are dead*****s who don't treat their partners properly and some have trouble keeping employment. Normal is whatever Jett decides.
Early intervention is critical but be wary of well meaning social workers and other professionals in this sector who try and band aid over Jett's hearing loss by telling you that he will be completely normal. All of these things will make it much easier for him when he grows up, but it doesn't take away from the fact that he can't hear everything so it's important that he have a range of tools at his disposal (including AUSLAN if you decide) as these will all help his choices in the future.
