Boom, Boom, Boom

In the Accompaniment book the arrangement for Ex. 4.18 Boom, Boom, Boom has a 3 beat pickup before each chord change. In all cases, except for the pickup before the IV chord, the last pickup note is 2". While I can see that the 1 draw looks like a better choice before the IV chord root I don't hear anything amiss with the 2". Was wondering if it sounds better to you or perhaps you had some other reason for making that choice? Thanks!