As you all know, every action has a consequence and some last longer than others. This is the case for both Principal Celestia and Sonata. Although the dark magic was withdrawn, Celestia's heart has been permanently weakened. She can't participate in vigorous activity and has to take special medicine to normalize her heart rhythms. However, the chances of her going into cardiac arrest are fairly low. She's going to have a pacemaker inserted just to be safe.
Since Sonata was hit with the greatest amount dark magic, her lungs will always be slightly inflamed. She has to take extra care to avoid triggers, such as dust or mold, which can make it difficult to breathe. She also has to take medicine through an inhaler to prevent asthma attacks. Although she's had a few attacks, she's learning to live with her condition.
On a lighter note, the rest of the Dazzlings have been allowed to enroll in Canterlot High. But, they've been sentenced to attend therapy sessions with the school psychologist, Dr. Wolf, for the remainder of the school year to help them start anew. Although many students have given them the cold shoulder, the Rainbooms (Sunset Shimmer especially) have all been there to give them a second chance.
As for Gaston, no one really knows what happened to him. Some say he's gone to another town to start fresh. Others say he's at another school, repeating what he's already done. But as I said, none of this is certain.
I'd say our former villains will be quite happy at Canterlot High. After all, they've already found six new friends. I do declare that the merging of the bands will allow them to develop their musical talents.
Things are not quite the same; they're different in a good way. But who knows what more shenanigans could be in store for our heroes.
