Mane 6 as Depicted in Post Crusade

Twilight
She’s mostly unchanged from her canon self. Except that instead of merely being a princess by title and wings, she’s also a mentor and teacher, just Celestial was to her. This is part of her friendship studies, where teaches what she knows to her student and how to work magic based off of that. She’s smart, compelling, and passionate about friendship.

Applejack
More protective and harsh about her honesty. A past adventure and problem with Apple Bloom had made her this way. Other than that, she still is the simple trustworthy and family centric farm pony. Only now, her apples are more famous and in demand due to royal endorsement.

Pinkie Pie
Being the co-guardian of a depressed filly had made her more cathartic and sensitive towards others feelings. Still, she tries to the cheery and happy pony that the town loves her for. Only now, she just tones it down a bit and refocuses her skills based on the pony she’s dealing with.

Rarity
Her business as a fashion designer has exploded. With her name now on the list of top designers in Equestria, and with a new job as mayor of her hometown, she’s more busy, and stressed out than ever. Sweetie isn’t much of a pest like she was in the past, bus she still gives her grief, sometimes on a whole new level. Hence, her relationship with her sister is rocky at best

Rainbow Dash
She’s now a Wonderbolt, at the cost of her relationship with Scootaloo. After returning to Ponyville for a training leave, she began working on repairing the damage done by the first failed attempt to adopt the young pegasus. She’s more sensitive and nervous around her, but is still the same old Rainbow Dash towards the rest of her friends.

Fluttershy
Not much as changed, though she’s now permanently more able to stand up for herself. She still takes full time care of any animal wanting her help, and she’s also volunteering to teach a class on animal care and responsibility.