Several SF tech companies have been polluted by former investment bankers. I presume pushing paper and face time have become even more important.
That may have worked for them, but I suspect it's filled the company with many media-only types in a toxic way similar to how Yahoo got hurt by thinking of themselves as only a media/ads company. That killed them against Google, who as Paul Graham pointed out, was a company that was still successful in feeling like a startup technology company well after becoming large.
Given Twitter's lack of technology innovations, I'm inclined to think they are more towards Yahoo than they are towards Google.
Like he wants to come in with a drop in OPEX such that he has some flexibility with finances by dropping some staff?