This (Dublin-Reykyavik on the Pursuit) was our first Azamara cruise (and only my second overall) and while I was generally very happy, the wine selection and availability was one of the few areas where I feel that the line falls short. From the very first night, a number of the wines on the Ultimate Package were not available, e.g. the Matanzas Creek Merlot*, the Pinot as you mentioned (for which was initially substituted La Crema, then a New Zealand Pinot whose name I did not catch), and the Sauvignon Blanc. For the most part, I felt the substitutions were not bad, but yeah . . . the SB Pinot is ~~$30 retail, La Crema $15. Also, it seemed that on multiple occasions they would refill a partially finished glass with the house wine without checking that we were drinking an Ultimate Package selection. That's one way to make a blend, I guess.
*Oddly, midway through the trip I saw an open bottle of the Matanzas Creek at one of the bars.