Content I'd like to see in the game? Let's see... (thinking pose) Well, I've only played up to part of Tarkus, but there are some things I'd like added. I'll start with the general stuff first.
Ship upgrades for one. I loved how in CoC you could have so many followers and lovers right there in your camp with you, and I get frustrated knowing that if I want Anno, I have to kick out either Reaha or Yammi (currently waiting for Reaha to work off the debt first). It would be nice to not be so limited in crew.
The second one is more pregnancy options, especially in the earlier planets. I'd love to be able to get my chara knocked up by a Naleen or a Zil, without needing a cunt-tail. Maybe have a scene where after losing to a male or female Naleen so many times, Steele gets dragged to one of those "mating balls" and gets gang-banged by the kitty-snakes? For the Zil pregnancy, maybe after the slavers quest you have the option of letting the Queen lay her eggs in you. If it's a reward, you are allowed to start your own "hive", while if it's a punishment, it's a potential Bad End leading to Steele ending up as an incubator and fuck toy for the Queen? Raksvel and Lapinara impregnations are also an idea, since there are so many of them.
On Mhen'ga: I'd like more content involving Able. He is just so adorable, and I want more of him! <3 (note: I would not say no to a pregnancy option with him. *hinthint*) An idea I had was him getting kidnapped by the slavers and being rescued by Steele. Depending on how it occurred, he could be so traumatized that he's afraid to go back to the plantation, and Steele could potentially make him a crew member who shares his/her bunk for comfort? Just a thought.
Hope that sparks some creative juices. If I have more thoughts after playing more of the game (I will) I'll let you know.