No, you are not making too big a deal of it.
My DS had some problems with a lad, when my DS was 10, and the older lad was 17 and we ended up going to court.
Our experience was that the police were fantastic and do everything to protect your DS and his needs.
You can just talk to them initially, and they will take step by step as to what is best for your DS. (there is a term for it but I am tired and can't remember it).
We were told DS, and ourselves, could decide if we just wanted the police to have a quiet word with the lad, a warning or prosecution. He was offered counselling at the time and also that if he needed it later on (when time has passed but events sink in).
I also felt it would have not given the lad who did it, the right message to simply 'get away with it'. He had other 'victims' and was reaching an age where the effects on his future would have far more reaching effects. This was not my over riding concern, but from a point of humanity, doing something stupid in your teens is a crap way to mess up your life without guidance to get you back on track. I figured as much as I wanted to protect my DS, if this lad got help and support to check his behaviour, it had to be a good thing.
For DS, who chose to prosecute, it was enormously empowering, as he had been subjected to a lot of bullying previously, so having people protect him and stand by him mattered an awful lot.
He didn't go to court, as the lad pleaded guilty and we got to express that we wanted him to have counselling included in his 'punishment'.
I think, and hope, that the course of action we took, has helped DS to deal with the incidents more positively now, so that in the long term, they have less impact on his future. He himself has a 'nodding terms' relationship with the lad as he has 'closure' (I hate that term but it sums up DS's state of mind). Where as I must confess, whilst I wish the (now) young man no ill, I struggle not to simmer internally when I see him.
Give your DS every opportunity to process this on his terms, and if you get the level of support that we did, then the less harm will hopefully done.
FWIW, my DS has come on leaps and bounds
It is a nightmare, but you can come out the other side with limited damage. I wish your DS, and yourselves all the best in getting through this xx