Why stop with the PC? There's an NPC called Astarte, spirit of the source, in a more revealing outfit.

The promotional poster is the tip of the iceberg. Haven't you people considered that there is a plethora of armors/robes in-game that haven't undergone your perusal? How sure are you that you've accomplished your goals by having a poster changed?

Did it ever occur to any of you, that with all those choices for armors and robes in the game, you might find an appropriate design that satisfies your needs? If Larian released info of an armor set available in-game that is in every sense practical (not a bikini armor) will that be enough? Will it be enough to know that you as a player had a choice what to wear?

How much of a game breaker would it be if one of the 3d artists created a sexy armor set just for kicks? Would the existence of that one, single set ruin the whole game even if you had the option not to wear it?

Did it escape everyone that with all the freedom the game designers are aiming to give the player, they would at least give you the freedom what to wear? No, really, did everyone think that the PC will be wearing a single outfit all throughout the game (specifically that one on the poster)?