When you run into a coffee like that, it can be interesting to sort a sample of that back out into its constituent parts and try roasting the separate components and comparing those with the combined coffee. You'll often find that the combined coffee is superior to either selection, and doing that exercise is a good way to start busting myths that some green coffee buyers believe about excessive sorting.
While writing about blending that sometimes happens at origin (at the mill or exporter) I got to use the phrase "bimodal distribution". Finding a raw coffee with a bimodal distribution on some physical attribute (color of the raw seed is easiest to spot) is a good indication that some kind of blending happened before the coffee reached the roaster.
I know a guy who complains about his company's "blend to value" program, but there are actually creative ways to use neutral blenders and I'm not sure if there's any literature on that at the moment so I'm spending some time writing on that. Cost control/profit enhancement/price stability is only one aspect there (also mentioned) which tends to be the only focus when that's discussed.
Plus they'll get to taste the same coffee roasted in 18 different ways (9 in a light to dark progression, 9 showing the impact of timing changes in different parts of a light, medium, or dark roast) and learn how to reason about what they're tasting and how to connect that to their roasting data.
It should be a fun class. There are a lot of coffee roasters who get trained in a single very specific approach to coffee roasting or who read stuff that convinces them that they must do things in a certain way and this class is all about breaking that down and empowering roasters to understand the contributions they can make to the finished product and how to make decisions that are right for their coffees, right for their business, and right for their customers.
Author of Typica software for coffee roasters.