It may not be a search under that case, but plenty of folks disagree with that assessment. It's not like the telcos publish metadata for anyone to read. It is private data, and the fact that government officers think they have carte blanche to get it, and worse, can find judges that agree with them, is disagreeable to a significant portion of the population.

Is it warranted (figuratively, not literally) in this instance? Perhaps. But nonetheless, it re-opens the conversation about the wider implications about warrantless searches.