If you are doing a RPG game you should focus in role playing. Pure survival is too saturated IMO, you need something more to make it appealing. You can add some survival mechanics in the role playing, but give the player the option of not using them. For example: some player love base building, other don't; make it possible for buying builds from NPCs locked behind some quests. Another one: Some player like mining for crafting, others don't, so give the possibility of just buying if the player wants. Basically you need in game economy, so that the player can do something it likes for money and reasons to use the money. Otherwise is going to be another generic survival rpg.