A subtle "Special Edition" or "vanilla plus" version that adds bug fixes, replay value, extra functionality, content and atmosphere to the game, all while retaining that overall vanilla feeling, rather than the feeling of a vanilla game with various mini-mods tacked on as an afterthought.
In v0.9 of Call of Pripyat: Special Edition, there will be a lot of changes to NPC graphics, sound, and gameplay elements that really help improve the atmosphere of the Zone. One of these improvements is providing side-quest NPCs with unique textures.
Crab benefits by more than just looks, because in the Special Edition he has his own unique pain sounds that he makes when you get close to him or walk away, and you can talk to him (kinda... he just basically wails in pain and asks for his mother.).