Yeah I would have thought that Rogue opening up to Gambit about his trying to kill her would have been a bigger deal for her. Of course, he was brainwashed but some of the stuff he said surely would make her question how much of it was the brainwashing and how much of it was how he really felt. This is especially true now because this issue established Gambit was able to cut through the SK's influence because of Rogue but yet he couldn't do it when he was Deathbit. So it opens up the question as to why?
And from Gambit's perspective, the Magneto thing for me speaks to a larger issue that Gambit should have. There was always this element where it appeared Rogue felt Gambit just liked the forbidden fruit aspect of their relationship and then the minute she gets control of her powers she bails. So all these years it seems Rogue was projecting and she was the one that appeared to only be committed to the extent her lack of control only allowed things to progress only so far. The minute she no longer had no excuses, she ran away.