Marion is in year 2 of a new system that was taken over only a month before the start of last season. While your assessment of the skill players makes sense, they aren’t big enough up front to protect long enough to be successful in the spread in the SWD. Triple is a good offense for a team that’s undersized up front with some decent athletes. The QB doesn’t necessarily have to be a great athlete (although that helps) but needs to be a good leader and good decision maker. Running triple also shortens the game and keeps the score from getting out of hand, allowing a weaker team to stay in games longer.