You have paid for your game I suppose you can use it whatever way you please. If you have fun styling sims in CAS, that is fine, at least you are using the game. Maybe you could try and tell your story in writing if the game doesn't offer you the assets you need to play it out. Or you could come up with a reason why Faye doesn't have her fairy wings. But to me sounds like you can't get involved into the gameplay, and I doubt that you will play out this story when and if we do get fairies. When the gameplay is captivating you get sucked in and play even if some things are not 100% to your liking and come up with reason why some things are not how you'd like them to be. Personally, I have found that if you don't put too much planning in your characters and stories and just follow the in game prompts, the sims wishes, likes and dislikes, etc., the stories tend to play themselves out and sometimes you end up with unexpected plotlines and I find that more interesting than planning the whole story in advance.
