It is difficult to say Pedro, because these teams usually work very well collectively. Araujo played a very good season in segunda and then in primera it was nothing special, and the same with Andone, that although is playing fine, does not score goals with so much facility.
I use to follow Lugo, the information about the other teams is more what I heard on radio-
Maybe I would say scorers, like Ortuño of Cádiz, or Joselu of Lugo, although none of them is especially young.
There is a good midfielder in Girona who will probably go to some team in primera: Pere Pons.
I would look more at coaches, many of them unknown. Perhaps I would highlight Álvaro Cervera, of Cadiz (ex- player of Valencia) since the team come from 2B or Martí, from Tenerife, team that is being a surprise, or even Hierro with Oviedo in his first experience being coach.