This just comes off as bias hyperbole to her. 2500 posts worldwide of people who didn't like the changes isn't much. FFXIV is huge, with a 2022 estimate being as high as 35.8m players with a 3.4m online daily average. Considering those who like the changes aren't going to be talking about it on the forums, 2500 posts, or even 25,000 posts, isn't an indicator of the change being negatively received by the majority.
How would this change lead to the job being removed from most groups when their damage is still as fine as ever? A group isn't going to kick Samurais because their kit was made easier to play optimally. If anything, it would be the opposite since it's less likely a player will make a mistake trying to optimize their rotation. So, that assertion makes no sense. Just because she isn't buying into a bias narrative to push the agenda you are hoping for, doesn't mean she can't give insight on the conversation.
The reality is that the devs can't base how well the changes are received just by going off a couple thousand complaint posts on the forums worldwide. Now, it doesn't mean it isn't being negatively received either, but trying to overstate things makes her more skeptical of the claim when it seems very clear to be coming from a position of bias.
What would be more objective is the relative average number of samurai players before and after the changes for an extended period of time. Also, if they sent out an in-game survey to active samurai players, where they could rate how they feel about the changes, that would also be a better way to filter through bias narratives being pushed online by those who don't happen to like the changes.
It's important to recognize that just because you don't have threads of people praising the changes, saying how they are glad the rotation was simplified, doesn't mean there aren't large numbers of people who feel that way who are simply playing the game and enjoying them. Historically, players do not make threads about liking such things. It's usually only when a player has a problem with something that they go out of their way to talk about it. This is why it's important to take complaint topics on the forums with a few grains of salt, as it isn't representative of the player base as a whole.