Trust me, it's not easier in Text games. I've got an RPG knocking about, not remotely ready for release, not even as an Alpha or a demo. Issue is, all those fetishes, groups, beast (as RPGs often have), frotting, feet, etc etc, it's a cluster fuck. And that's without animations (but with other genders, admittedly). It's text. And it's still crazy hard to try accompany all those different groups, even if it's just writing it up.
Honestly, if he focuses on items 1 and 3, that'll be a good basis. 2 can come when the main game is over 50% done (I'd say 80% just to take the stress off) and leave 4 for dead last.