The maps are too focused on close-quarters combat for scout rifles to be of consistent usefulness. Generally speaking, you can't be too aggressive with Scouts when everyone and their mother is going apeshit with Thorns, Hawkmoons, and Last Words. You're generally relegated to playing passively and cautiously so you can pick off targets and get the jump on your victims before you get steamrolled by exotics. That's not to say there are bad scout rifles. NL Shadow, Deadshot Luna, Scholar, Gheleon's, and MIDA Multi-Tool are monsters in the right hands. Plus there's hope for the new Playstation-exclusive Scout Rifle - The Jade Rabbit!