No, the problem seems to be the disillusion by Slack leadership that somehow Salesforce would incorporate Slack culture rather than Slack culture slowly being morphed into Salesforce culture.
> “The problem has been, there’s no incorporation of the Slack culture into the Salesforce culture,” Butterfield said, according to an audio recording of the meeting obtained by Fortune. “And unless there is some element of that, then it’s not integration in any sense. It’s just the elimination.”
Not sure how anyone would think a acquisition would lead to the parent company starting to incorporate bought company's culture into their own, haven't seen that in the wild anywhere.