I don't see the Witcher 3 parallel other than it being a fantasy game
Then you are pretty ignorant about games. The cursed swamp with hag area, the bard NPC, trying to push romance too much into story. The wannabe Witcher 3 is so obvious.
Bards were in DnD and BG way before W3. In BG2 there was a bard theater stronghold side quest that puts W3 to shame.
BG2 brought romance to games. The only difference is nudity and sex which God of War had before W3.