Here is the 3rd CATC demo. It features a huge grab-system upgrade with a lot more positions ported over from HRT! Lucia's lust inflicting ability also have additional effect if it causes target's lust to overfill. Give those things a try!
Otherwise, if you are interesting in tweaking side of things, a lot more game data is now exposed via json files. Head to /assets/json/ folder and take a look at unitdatas_.json, outfits_.json, grabdatas_.json and others.