I don't know a lot about Little but my understanding is that Salas is more of a slot receiver where as Little can line up more outside.
This team doesn't throw enough to require stars at WR. Just be reliable. As long as these guys are smart, run solid routes and are sure-handed, they can contribute to a productive offense.
Dez Lewis is a physically-imposing specimen and is just beginning to come into his own. My guess is that Listenbee misses the season. Call it a redshirt. Easley is too highly-regarded as a gunner to be released but I don't know about the severity of his injury.