Unfortunately, I cannot speak to Ballybunion, but I don't think there is a problem at CPC. Each is so different than its pair that it is easy to forget that they come in succession. The only time I have a problem with consecutive holes of the same par is when I feel like I am playing the same hole twice in a row. Sometime consecutive holes feel too much alike even with different pars, but the consecutive pars at CPC don't suffer that fate. CPC 16 may have more in common with the 17th than with the 15th, and while they are obviously very different golf holes I more closely associate CPC 4 and 5 than I do CPC 5 and 6. It is a feel thing.
Frankly, I think that this complaint (consecutive par 3s or 5s) is the refuge of those who want to be critical but can't think of anything intelligent to say. Are consecutive par 4s a problem? Or does it depend on the similarity and feel of the holes? Why should it be any different with par 3s and par 5s?
It's just another example of the absurdity of the impact that the concept of par has on our conception of design.