Are you looking to breed with him and sell his offspring ? Unfortunately "cow hocked" is seen as a major conformation issue for some and may very well turn potential buyers away, especially if they wish to view the stallion. If he happens to pass it onto his offspring then you have another issue in itself. Gelding him will also make for a "better student"
I am 100% with you in saying you should definitely teach him to drive. Being that he is only a 2yo, he is still a baby in my eyes, most of my horses over the years and ones ive been involved with are usually left till they are 3yos before being broken in, as they are still developing. It will certainly help your cause by doing heaps of exercises and hill work as mentioned by others here, in the leadup to teaching him to drive.
Its a big decision to make , keep us posted on what you decide .