Outside of her three personal quests, Triss is largely relegated to being a background NPC. If this was a stand alone game that's not going to be a major issue but it's not a stand alone game. In The Witcher, Triss was one of two romance choices (the other being Shani who hasn't featured since). In The Witcher 2, she's the
only romance choice and is portrayed as the love of Geralt's life - although it's not that simple because Yennefer was previously the love of his life so it's a love triangle they all find themselves in. The player can choose to break up with her if he wants though, if he wants to role play as preferring Yennefer.
The problem for us is that sine many of us chose Triss in both the previous games, having her relegated to a background NPC was never going to go down well with us. The reasons are different - some because they love the character, others because they see it as disrespectful of their previous choices, but all of us agree we want it fixed. CDPR released a very vague statement saying they acknowledge there are issues surrounding her but have thus far decided not to go in to any detail.
What we are attempting to do is present them with ideas on how we feel she can be improved and put on the same level as Yennefer is in the game. I hope that answers your question. Welcome to the thread, and the series, by the way