Well we don’t know how big Eric’s storyline is in 306. And if they go right from 306 to 307, he could play a larger role in 307 but not stop shooting.
Episode 6 is where we learn Ariel’s backstory though. I’d think he’d have to play a bigger part. It sounded like he only filmed dancing ballroom scenes on his first day.
We’re not going to see Eric in flashbacks for 7 too.