Rachel has said some negative things about Harris and Blitzer being out of touch billionaires, which doesn't seem at all unreasonable, and it's also been implied that her and Shero didn't really get along. But she's has had nothing but positive things to say about her personal interactions with Taylor Hall, Nico Hischier, Brian Boyle, Joey Anderson, and other guys she's been around. So I don't think it's fair to characterize her as someone with an axe to grind. I always got the impression that she's a person with very strong opinions and that rubbed our shot callers the wrong way.
In fact I think it's a little weird that she offers up a criticism of a prospect we haven't even drafted yet - a criticism that is seemingly echoed by other experts - and people are eager to assign ulterior motives and call her a hater or whatever. If she said the same thing about Owen Power no one on here would care, but because she's criticizing Jack's brother everyone on here is rushing to question it.
In regards to "character issues", that's something that's really hard to evaluate unless you know specifically of what they mean. If she just means he's a sheltered privileged little shithead jock, then yeah that's annoying and I wouldn't want to hang out with him but I don't think it's necessarily disqualifying for an NHL player. In fact I'd say the vast majority of NHL players are likely not good dudes, I know the ones I've met have been total assholes with the exception of two. And I can totally understand why a woman would be less likely to be persuaded by the "boys will be boys and they'll grow out of it" excuse.
But if it's more serious than just being an entitled teenaged brat, then it needs to be taken seriously and I think that it will. At this point I trust Castron to do his due diligence and I trust Lindy Ruff to handle his room.