Not being required to become a bimbo to start a porn career would already make it feel fresh. I'm sure some popular nude models were at least once offered to participate in porn/near-porn shoots. Particularly, Veronica Zemanova comes to mind where there's a video going around of her shooting with a guy, giving him handjob and some boobjob, but when he seems to move in to penetrate her, she stops and bails, making it the most hardcore content in her career. At the same time, she did quite a bit of solo photo shoots with toys and some girl on girl.
So it would be perfectly in theme for Lena to be offered the same or to be approached by a porn company if she climbs the ladder high (unless she has a lot of lust and decides to audition on her own), and it wouldn't require some weird conditions such as going to a lame tv show that exposes her to everyone and ruins her previous life.
That's debatable. I think execution determines if the route is boring or not. In GGGB, the porn wasn't exactly a "route". It was mostly an outcome, where Ash loses every moral, makes dumb decisions, gets exposed, gets her life ruined, etc. The porn is more like the only option she has left because everyone else rejects her, and that's why she can accept it so easily and change so drastically. It's to say "Ashley Graham is dead. Now it's Ash Foxxxy". Ultimate corruption equal to the Thug boss Ashley.
In ORS it can be more nuanced, where it doesn't necessarily mean corruption that results in "OMG, I'm a cock-hungry whore" Lena, but either an extension of her creative personality (to create tasteful porn that is erotic and exciting but isn't "dirty"), or as a necessity due to money problems or simply because she's curious to try something new, and maybe unleash her sumbissive personality on the set without suffering any heartbreaks. In addition, she can maybe click with one of the porn actors that might result in a relationship, for those who don't want to pursue the "obvious" Ian choice and don't like any of the other male characters. And that route might provide a lot of options for drama, too. It's not just the sex in the industry, there are a lot of BTS stuff going on that we usually don't see or pay attention to.
Do her parents get to know or can she keep them in the dark? Does she tell them and gets accepted or do they disown her? And if they do, will Molly and Ed adopt her, ultimately fulfilling their wish to become parents? That path can also intersect with Ian's voyeur path, and it would no doubt be a challenge for their relationship. Do they keep a loving relationship or they lose the spark? How do her friends react to her new outlet? Can she keep her social circle, or would she have to replace them with friends from the industry? Can she keep a cool head, or will her submissive personality overtake her to end up being abused and taken advantage of? Can she succeed in that career or will she stumble and fall like Jessica in GGGB?