It can't, because Ellie's section is very lacking in plot. Once they enter Seatle it's really just looking for some people, Dina revealing she's pregnant, and Jessie showing up. It's then capped off with Abby paying a surprise visit and shooting Jessie. The reason they put Ellie and Dina's romantic build-up in Seatle instead of before is to have somekind of plot progression, because without it there would've seriously not been anything that happened, even if they included Jordan and that one dead girl they find at the TV station.
The next season will likely fair much better since Abby's section actually has plot.
I mean both "have plot", it's just that Abby's half
feels busier because her goals keep changing.
At first her goal is to find Owen, which she does. Other than a rather subdued love triangle between her, Owen and Mel, and the Israel-Palestine thing in the background, I'd say she's firmly back in plotless territory - she's not really trying to do anything - until she decides to go back to help out Yara and Lev out of a misplaced sense of guilt.
In a continuation of that, she now has to go find meds for Yara.
Then she decides to go rescue Lev before he wins a frankly long overdue Darwin Award.
Then she decides to go avenge Owen/Mel.
Then she decides to co-opt Owen's original plan of sailing to Santa Barbara with Lev in tow.
Compare Abby's checklist of fetch quests and changing priorities to Ellie's Gotta Kill 'Em All campaign, which isn't exactly plotless - she too has a love triangle of her own, and the show amplifies the IDF/Palestine thing in her background too - it's just she's more focused than Abby. Her plot "progresses" by spiraling into anger and misery, which we haven't seen because she has yet to kill more than two people - one in self-defense - or alienate Dina from her. I think the show's also missing a trick by either ignoring or deleting Tommy's rampage.