A lot of your decisions should depend on where he is in his growth cycle; is he full height or will he be 6'8" and 220 in two years?I
If he's full height, he should start to rearrange the bulk - which is not a quick process, but coaches will notice as his body begins to take on a different form. Also, since most boys his age do not really enjoy hard physical training, the discipline needed to rearrange his body will be a great start on a long road.
As a HS freshman, most of his peers haven't really begun to physically mature and as those boys do, his size advantage may begin to close, so he needs to really take his individual skills to a new level. If money is a limiter, I'd focus on physical skills and not get caught up in the high end travel ball scene; if not, NBD. You didn't say if he started and played every inning - if so, fine; if not the team rankings will do him little good and he should go where he plays every inning.
In any event, you have plenty of time. At his age, his size will be noticed, and coaches will follow to see if his athleticism will improve. And, it's never too early to make sure his classroom effort matches his baseball effort - the better that area, the more options.