I really liked seeing Morrigan again and her in her own outfit? No complaints from me!
I think they did it more as a favor to the fans with the fact they brought Morrigan back and she was the same Morrigan they remember.
Plus I think her standing around in the garden dressed up like a silly noble would have seemed VERY out of character for her. her outfit is like her attitude. Bold and out there for all to see.
Hawke is sort of in the same boat but at least it's armor and that's a little bit more understandable. I guess that's what she considers armor or maybe she's wearing the robes of possession that you give her when you pretend to kill Flemeth for her and is forced to wear that all the time. Kinda funny if you think about it especially when she drinks from the well.
Seriously though she doesn't have to dress like a noble but something a little more "Morrigan" but updated. Also this is not 9:30-31 Dragon this is HARVESTMERE, 9:41 DRAGON *in Fiona's dark future voice. A decade of fashion to draw from! Her dress at the Ball was very Morrigan... the dark colors and her signature blue/green feathers pinned to the plunging neckline that drops just low enough to reveal an interesting metallic bra she teases us with underneath.
She looks like a wild woman standing next to her son in the Skyhold Garden. He's dressed very "Morrigan".
I'm still mad over the ridiculous inquisition formal outfits you, your party members and your advisers have to wear to the ball. I would've loved to see character specific formal attire. They could have done so much interesting stuff with Leliana, Josephine, Vivienne, Dorian and Cole, etc. Seriously Vivienne would not wear that sh*t ever. That conversation Dorian has with Cole about the hats, so much potential...
Also what about the masks? Why are the inquisition members the only people unmasked? Actually Morrigan too. But I feel that's very Morrigan of her. She'll compromise only so much so no silly mask for her.
The only way I can explain it(to myself) they are coming with an attitude that this is their "true" face they wish to show "Thedas" or "Orlais". And the reason for the same attire is to convey some type of intimidation or force to be reckoned with. It makes sense only if you don't do any of that double dealing nonsense with Celene, Briala, and Gaspard and force all 3 of them to work together.