I mean, the Alex route wasn't GOOD... but neither was the David route. David's route is Blackmail and Bribe the bitch until you can pressure her into sex. Alex's route is make doe eyes at her, creep all day every day, and keep asking until she finally relents and likes you.
That means that Alex's route, at least thus far is generally supposed to be about Tasha actually liking him. The only reason that she is happy being a model in the first place is that David was able to get her much higher payments than she is worth as a rookie. The point of the Alex this isn't supposed to be about how he supports her. The only reason at all that she gets with David is because of money, with Alex it's at least supposed to be an advancing relationship, one that isn't sketched out pretty well, but one she does seem to enjoy.
Enjoy, again, by the game's rationale. She is far more involved with the scenes with Alex, wherein the David scenes are both "Wham Bam Thank you ma'am". Hell, despite being a quick shot in his scenes Tasha talks about her enjoyment of the sex a hell of a lot more than she ever did with David as well.
That's not, of course, to say that there shouldn't BE more of a story, like say, Alex helping her become a web model instead of a magazine one, but whatever. Not expecting much else.
Either way though, I prefer the reading of Tasha's motives at this point of stringing Alex along to get him to murder his dad, and get the inheritance for her.
Still say we need a unity route, where Tasha plays them both for chumps.