Yes they are if they, in my eyes, deliberately sexualize women for the sake of sexualization. Having Siri run around with her bra showing has got nothing to do with mature content. Neither has her wearing eyeliner or highheeled boots. It's just degrading in a way that it basically says: look at this girly girl, because would she have been displayed in proper fighting attire, which would actually also have been weather proof, which would be smart seeing as every other character which travels different climate zones wears such attire, with proper boots in which she could actually run several miles (ever seen any woman run in highheeled boots?) she might have come across as to threatening for the likes of you because you wouldn't be able to shag her in game since she is your daughter. Which is usually the way the Witcher franchise negates powerful women... you can quite simply fuck them, so they aren't threatening anymore.
Triss does not wear a cloak. She wears a hood. If you actually had paid attention to the game you would have noticed that aside from the hood she permanently has her cleavage displayed, never once does she wear attire which covers it. For all the fur colars in the world Ciri for example even wears her thin shift in the harsh weather of Skellige and again her her bra out. Not very practical now is it? I doubt the Elder Blood comes with an inbuild heater.
A fighter and warrior should actually care what he or she is wearing since it's the most basic protection in a fight. So sorry but I don't see any male soldiers in that game running around without any kind of protection... funnily the only 2 female warriors of note Ves and Ciri wear nothing more than half open blouses with their tits and or bra showing... I think that's pretty degrading as far as portraying strong female characters and I personall don't understand it. There is no reason whatsoever for it, given that you even have the choice to send Ciri into the sauna in a towel, which actually covers more than her usual dress. Even Vernon Roche tells Ves it's unprofessional to go into battle with your knockers out which should tell you all you need to know about warriors and fighters not caring what kind of armor they wear.
The DLC I'm suggesting is similar to the one for Yennefer... or how about the one for Geralts hair. It's a DLC and it's about cosmetics. I want a proper warrior Ciri, a Triss that doesn't shove her tits in everyones face and a proper warrior Ves.