Precisely. Honestly, in regards to that specific character change, the anachronistic 'womanpower' attitude of Talisa wasn't even what maddened me the most (although it was certainly annoying and out-of-place), but how it drastically altered the character of both Robb & Jeyne and the uniqueness of their marriage's circumstances for the worse.

Robb and Jeyne didn't love each other as you said, they probably liked each other well enough on account of being two reasonably attractive teenagers, but they only got hitched because Robb's honor and memory of his (seeming) half-brother Jon wouldn't let him take a highborn maiden's virginity and saddle his child by her with bastardy. Kings and princes making poor matches to their own detriment b/c 'luv' happens all the time in medieval fantasy or historical fiction where there's a romantic arc involved, but them making poor matches for honor's sake, not so much.

(Also, Jeyne was a Westerosi-born noblewoman, even if her house was one of lesser nobility that was in decline, so she'd have been a controversial but still somewhat believable match for King Robb had they lived in better times)

But nah, Weiss & Benioff turned that unique and complicated situation into one where the King in the North falls in love with a random foreign nurse for backtalking him, then marries her in violation of all common sense and in so doing, actually throws his honor under the bus to be with her - literally the opposite of what Book-Robb was trying to do (balancing his honor, Jeyne's, and the Freys'). Stories where 'royalty marries commoner, gets screwed over because of it' are a dime a dozen and thus don't have nearly as much impact as the Robb/Jeyne relationship, IMO.