I heard most of Philpott's interview as well. She is very well spoken, and I have a lot more sympathy for her than Jody.
But at the end of the day, if you cannot express confidence in your leader in our party system, this is what will happen. Rob Oliphant had a good quote about how he often disagrees with the party, and expresses that, but still is overall able to maintain confidence in the government. And, judging by all available reports, this move was driven by the caucus. The taped recording was the straw that broke the camel's back; it really made JWR seem like she had her own agenda in all this.
Of course, there is also the fact that Philpott and JWR were actively and deliberately undermining Trudeau's (and the rest of caucus') reelection chances too.