Although I would love for Jagex to give the catacombs the same treatment as Nieve's cave I doubt it'll happen for a long time and here's why..
Nieve's cave wasn't created by an artist, all assets used to make it were done by Mod Reach(I think?) and he was just a content developer. It made sense to redesign Nieve's cave because it wasn't just dividing it into smaller themed caves, it was also giving it a fresh new look which the catacombs already has.
Nieve's cave was next door to a Slayer master and a bank. This made the cave rather overpowered because you could do nearly every single slayer task without leaving the Gnome Stronghold. Although catacombs is rather overpowered, separating it into smaller dungeons won't fix this.
Redesigning the catacombs serves no practical purpose. I doubt the OSRS team would want to invest the time required into this, unlike Nieve's cave and Great Kourend, redesigning the catacombs seems to be a purely cosmetic update.
Don't get me wrong, as I said I would love for Jagex to do it but I don't see Jagex giving it the dev time.