There are still some options for some quests where Claire can use seduction without actually putting out, but I would say it is absolutely not the focus of the game right now.
Maybe in the future there will be more content where subtle seduction is the focus, but for now most quests either require Claire to be a good fighter or to be down for some very kinky sex.
Keep in mind the design is pretty much that of an open-world game, I think that in the future they will add more quests focusing on seduction (with the high nobility in Valos, or that future third island that's supposed to be all about seduction), but I don't think you will ever be able to play the whole game just with seduction.