Your boy is stunning! I really love him. But I'm a sucker for anything Percheron.
I really think you are going to see a huge difference after he is gelded. Our two-year-old was gelded six months ago and improved in his overall attitude as soon as it was done. He stopped biting, and became much better with his feet, though he is still a very impatient young man and I have been kicked by him while trimming. >.<
If he does kick at you, you need to make it perfectly clear that this is totally unacceptable. You know what level of discipline he can handle. And being as safe as you can, you -must- pick up the offending hoof and get him to relax, even for a few seconds, before calling the session quits. He mustn't pick up the idea that he can get away with this. While he sounds like a big boy, he's going to be an even BIGGER boy very soon, and the bigger they are the harder they are on you when giving you trouble with feet.
When you are lifting his feet, simply expect a few seconds of calm and then give the foot back and praise him. Gradually build up the amount of time you expect from him, but do your best to avoid a negative reaction. This has worked well with my own Percheron cross 9-month-old, and I can now trim him in the pasture! The first few sessions of hoof-lifting with him he tried to lay down in the barn aisle, so he's progressed a long way with a bit of reassurance and the odd "fight" over holding it up.
It's tricky if he is reacting to the simple presence of your farrier. Does he have a problem with men in general? It might be nice if the farrier can "socialize" with him for a little while before going to work, perhaps a treat or two or a scratch in his favourite place.
It sounds like you're doing a great job with him, so keep it up! I hope you can work through these hoof issues without too much drama.