It makes sense that Lena has more customisation over Ian, women dress up more and it's more fun to dress them up for the mayority of the players. GGGB proved it and in Lena's case it just does it again successfully.
The issue is that the money system is largely wasted on Ian. He only needs it for rent and presents. The former is no issue as of now, the latter could be utilized much more often. By contrast, Lena works constantly in different places with different people (restaurant, cafe, modeling, art, stalkfap, Seymour, bar, music, later on Mike and Billy) and her payment is linked with the plot and character progression. Ian has the two big projects that likely give him once a boon (tournament, book), his main job is never in trouble (it should have been after chapter 9 Seymour, but that turned out to be a dud).
Just as with everything, the Lena content is given more attention than the Ian content and it just gets worse if nothing changes.