I like this terminology better. It is certainly more accurate. The reason for something being underutilized is usually that people don't have an accurate or adequate understanding of something. This is often the case with many of these fish species.
Sometimes I catch these underutilized fish species while targeting other fish, or while using non-species specific techniques. But sometimes I target them intentionally. This can be VERY fun and often quite challenging.
Here's some of these species that I was fortunate to tangle with in 2010:
Freshwater Drum will hit bait and lures, and often put up an excellent but usually short-lived fight.
Channel Catfish aren’t completely underutilized. Baitfishing for them is very popular, but not many specifically target these predators with lures and flies. Very stong fighters once hooked!
Grass Carp…I’ve only caught them on fly-fishing gear, which is challenge and often frustrating. I haven’t tried baitfishing for them yet. Excellent fighters once hooked, they don’t give up.
Common Carp are another excellent challenge on flies and lures, but they can be caught without bait or snagging!