The big difference between this, Weinstein, and others is that all we have is Lasseter's letter and anonymous 'sources' (unless I'm missing something). As far as I can see no one has stepped forward yet although I wouldn't be surprised if people now feel confident to step up. The extent of how bad this is though IMO, should be reserved until there are actual accusations made rather than anonymous insider sources.
I have no doubt that Lasseter behaved badly - he admitted as much. I just always hate to treat anonymously sourced info in regards to specifics as fact, especially when it involved serious charges like this.