The biggest problem facing Xavier on the offensive end right now is that they are shooting 32.5% from behind the arc, good for 224th in the country. Despite that gruesome number, they still take 38% of their shots from behind the arc, a number that places them just above average in the nation.
National averages can deceive a bit though, as there are 353 D1 teams but only 36 at-large bids. Xavier's 3P shooting of meaningfully below average on just above average rates seems worse in that context. Also, consider this: of the 75 high-major D1 teams only Penn State shoots threes more often but less successfully than Xavier.