What if twilight never managed to unswap their cutie marks? What if they adapt?
Personally, I don't think they'd change their personalities much, and they certainly don't have to swap jobs with each other. Your cutie mark is what you make it to be! Though, I do think it would impact them, of course. SO pardon the simple doodles, but I've been thinking about this for a while now!
I'll leave my headcanons under the cut!
APPLE JACK - Rarity's cutie mark represents her inspiration and creativity, not that she can sew! Apple Jack would still very much work the farm, still living with her family! She just now has a new hobby. She now does sculptures from dead tree's wood and incorporates gemstones into them. And they are GIANT. Her main method for carving is bucking off pieces. She cut her hair shorter because she was tired of having so many splinters and debris getting caught in her hair all the time (and just cus I think it's cute!)
FLUTTERSHY - Pinkie's cutie mark represents her talent for entertaining and making people happy! I don't know how much Flutter's cutie mark impacts on her connection to animals, but I do think she'd have to pivot on her profession a lot. It's shown in the Halloween episode (season 5) that Flutters draws anime, so I think she'd get joy out of entertaining through stories! So she can still cause joy, but doesn't have to leave her home all that much. Put a pencil in her hair just cus, and we know she likes to wear her hair up from her finale design so.
Rarity - RD's talent is... going fast ig, and like,,, trying your best? idk. But in the swap ep, we see that Rarity now has weather magic, which presumably, she didn't have before. Rarity still sews, but she sees an old love of her calling: theater! She now has this ability to control weather that does not involve physical connection to the elements, so she goes into theater tech work to make the experience more immersive. She ties her hair just for the aesthetics~
PINKIE - Aj's cutie mark represents her connection to her family. I think Pinkie would connect to the "rock" aspect of her family much more. She bakes as a hobby already, and we know she makes rock candy with Maud, so now she dives head into rock candy making. And since the Apples are her family as well, her most perfected recipe is apple flavored (and shaped;) rock candy. I put a rock candy hair tie on her hair just because it is cute :3
RAINBOW DASH - Flutter's cutie mark represents her connection to animals and her ability to deal with them. That wouldn't dampen RD's sense of adventure though! So she decides to use this new animal connection to help them out while still getting her fair share of adventure! So I thought: firefighter! With a specialty in animal rescue here. For funsies I drew her in her uniform, but aside from maybe getting her hair cut, RD wouldn't change her appearance that much.
Continuing the Element Swap Ideas with Rainbowdash, AkA Solar Flare.
I imagine her "magic talent" is more about protecting those around her and teaching others to be kind.
Her Story:
Solar Flare always had a heightened sense of justice growing up. She was never good at school, but she was popular and made sure to protect those who would be bullied. Despite not studying, she always managed to have strong magic - but used it in unconventional ways. She was also really good at helping others make friends, seeming to know just how to get others to connect. She also admired Celestia greatly, hearing stories of her protecting others in the past. When Celestia disappeared at the summer sun celebration, she jumped into action to help out- pulling five other mares along with her.