"more likely to be expelled, bullied, not have a job and commit suicide"
Eek! Not quite the bit of good cheer you're hoping for.
I won't say that life is easy, because it isn't. But if you know that those things are more likely, it gives you a brilliant opportunity to put the help and support in place to stop each one of them. Finding a good school, with a good antibullying policy, and using services like the NAS Prospects employment service to help find a job if necessary - there's ways round a lot of things. Not always easy ways. But there are. As for the suicide thing, they're looking at data on adults with an ASD who have mostly had zero help, zero support all our lives, and lots of us grew up in the "oh it's just a bit of bullying - stand up for yourself!" culture.
Yes, many of us got to the point of wanting the 'pain' to stop. I did at one stage. But remember we've had no help. That won't be the case for him.
I guess they'll say whether it's mild, moderate or severe later on when they do a further assessment.
Meantime, look for the things he can do well. Those are the strengths that will get him through life. Build on those skills, if you can, rather than spend 100% of the effort on social skills. They're important, but they don't need to be world-beating