I'd sort of disagree here, though I guess it depends on what "aspects" of Aeryn's character we're talking about and how long is "a while." The rest of season 2, while not as explicitly focused on Aeryn's emotional development as TWWW is, certainly does take it into account. The "Look at the Princess" trilogy, though not my favorite of the Farscape multi-part eps, is quite interesting for Aeryn, I think. And "Beware of Dog" manages to deal with her emotions and attachments while being a sort of lighthearted and slightly cheesy episode.

And then season 3 is all about Aeryn's development--it's sort of the season of Aeryn in some ways (though everyone else gets good play, too!). So maybe that's "a while" in the future--but there's lots of good stuff in between, in my opinion, at least!