^ Tbf, I think you should consider two other quantitative things. Rubel & company's stats individually before Ian's tenure and during Ian's tenure. Additionally, the above stats analysis would be bolstered with consideration of Rubel and co's econ rates during Ian's tenure.
For a more qualitative review, it may even be desirable to look at the CI commentary from those matches during his tenure and note how many edges, yorkers, good slower deliveries, well-directed bouncers the pacers managed. Given that it's only 14 ODIs, it shouldn't take too long. (I could volunteer to do this even)