Homogeneous reaction conditions have some advantages over heterogeneous reactions (such as the biphasic Oxidation of Borneol lab described in the lab manual).

For example, efficient stirring may not be as critical. Isopropanol (i. e. 2-propanol) is an organic solvent that is miscible with water.

Imagine someone proposed using isopropanol instead of ethyl acetate as the organic solvent as a possible improvement to the experiment.

Why would that be a bad idea? There is a very specific reason to expect that this would not work, so your answer should be specific.