There's still a lot of research to be done on hop oils, but as an IPA brewer I would definitely start tracking things like linalool/geraniol/citronellol if I had the ability to do so. A lot of these hop oils allegedly represent the flavors and aromas I'm trying to cram in my beer. Having this data available would certainly help focus some experimentation.
A breakdown of the essential oils is really only useful if one is blending for a specific oil profile or attempting to identify a cultivar. The megas blend in order to achieve a consistent oil profile for use in a delicately flavored product.
The volume of oil per weight of hops is more important in craft brewing because the oil content in the popular late hops can swing by as much as 2.5% v/w. Linalool for Zeus falls into the range of 0.3% to 0.6% of the total oil. One hundred grams of Zeus with 4% oils and 0.3% linalool contains 4 x 0.003 = 0.012 milliters of linalool whereas the same amount of hops with 1.5% oils and 0.6% linalool contains 1.5 x 0.006 = 0.009 milliters of linalool.
The thing that I liked about Mark Garetz's hops is that they carried a v/w oil rating, which made consistent late hopping much easier. His hops were usually a big step up from what was sold in the homebrew trade.