While I agree that there is - obviously - new dialoge lines for both women I disagree with your assessment that this is "nice stuff". I think the lines for Yen are pretty bad. Two levels below of what CDPR should be capable of (theoretically).
But I still don't get the public outrage. It's not like this changes anything on a fundamental level for Yen that wasn't already there in TW3...
I think one of the lines that is upsetting people is
"But it turned out my amnesia'd changed nothing. Wanted to be with you before, during, after - always."
Since Geralt broke up with Triss in W2.