Welcome. It is not unusual for AS people to have motor co-ordination difficulties. I had these in childhood though not at older stages of my life. On the other hand, having an advanced vocabulary is very much more useful right throughout life, and he sounds as if he is very gifted in that ability. He won't grow out of that, it will only get better.
All children though have uneven profiles, not only AS children. Playing to their strengths is always a great encouragement, and helps bring out the best in most kids.
I have three adult children, 5 grandchildren, and most are on the spectrum. Only one of us was severely affected, and he is 19 now. He was very under-rated at school though his father (my son) never stopped identifying and playing to his strengths and expressing confidence in those strengths. He was the opposite to your son, good cordination was his dominant ability. Next month he takes up a 3 year scholarship overseas, in the sport that he represented New Zealand in as an under 18 year old. If I had the energy, I would seek out all the teachers who condescended to him in his very formative years and acted as if he had nothing to offer. I would also speak sternly to those who failed to recognise that this child was a visual learner, which was literally staring them in the face. He didn't learn well with a teacher who taught by just talking at young students. He learned fast if he was given a chance to process information visually, but they didn't give him that chance. We did, though. We knew him much better than they did, and knew he was quite intelligent with an impressive memory.
I hope you may find some inspiration in this; although we believed in him, he exceeded our expectations, and though he still has some challenges - people who fire questions at him machine gun style can trigger a meltdown - they often arise from the misunderstanding of other people rather than intrinsic factors. He has to live in a largely NT world and we have done our best to prepare him for that, though not to the point that we have tried to change who he is - a very loving young man who has shown a lot of courage. Your son may be more gifted, so who knows how far he may go.
The important thing is that knowledge is power. Once we knew he was a visual learner, it gave us the power to empower him, and we did. So I encourage you to really look at your son's particular styles in the same kind of way.