Well, Twilight might be very interested in the unique storytelling of the SAO Abridged Fanfiction. She would probably analyze the plot structure and the way the characters are portrayed. Rainbow Dash might find the action parts exciting and start comparing it to her own adventures in Equestria. Pinkie Pie would be all over the place, laughing at the funny moments and maybe even throwing a little party while watching.
Well, Ruby might be really excited. She loves new and interesting stories, and the SAO Abridged fanfiction could be full of action that would appeal to her sense of adventure. Weiss might be a bit more critical at first, but she could end up getting into it as she realizes the unique take on the SAO world. Blake would probably be interested in the characters' relationships and how they are portrayed in the fanfiction. Yang would likely enjoy the more intense and exciting parts, cheering on the characters during battles.
They might be really intrigued. Ruby would probably be excited about the new and different take on the SAO world. Weiss might be a bit critical at first, analyzing the writing style and how it adheres to the original concepts. Blake could be drawn in by the unique interpretations of the characters, while Yang would enjoy the action-packed parts and cheer on the characters during intense scenes.
The most popular is probably 'Sword Art Online: Progressive'. It has gained a lot of popularity due to its in - depth look at the early floors of Aincrad. Fans love how it expands on the original story and gives more backstory to the characters.