Since the island sanctuary is a personal instance, I think it would be amazing if we had full control over the time and weather in that instance (even if only superficial/visual).

I've been playing the game since launch and I never managed to get used to the short day and night cycle, it never leaves enough time to enjoy the sunset etc.

If the intention of the sanctuaries is chilling, then we definitely need to have control over time and weather to allow the ultimate chilling experience!

It could even be implemented into the story of the island sanctuary, discovering an ancient magic stone allowing the control of weather or something like that.