Note: I don't run barrels, but...
He's a cutie! He is heavy on the front and (I think) downhill... but I quite like the look of him, personally! How does he ride? Can you get his haunches under him when you need to? Does he reach under himself when he moves?
In the second picture he has a little belly, which makes me think he could benefit from some abdominal (hill) work that might also help him use his hind end.
The only way to find out is to try, huh? :)