I've had the weekend to digest this and have really only got myself pissed off even more. It was time for Matheny and his BFF to go, that's for sure. The blame for the sorry state of this franchise should not be laid entirely at Matheny's feet, though. This is the first time that this ownership group has fired a manager mid-season. Think about that for a second. I think that this is Mo and possibly Girsch going into preservation mode. If the firing had waited until the end of the season, then Mo and Girsch would have likely been fired too. However, since they did it now and named in interim manager, the people that are responsible for this clusterfuck of a roster have bought themselves at least another year. If Shildt is somehow able to put the dumpster fire out (finish above .500 for the second half would be deemed a success by an interim manager), they they can say "see, the roster that we put together was good enough". They will then look for a new manager and possibly make a run at Girardi. If Shildt is not successful, then they'll simply point at him and say "he just wasn't ready". If Shildt pulls a rabbit out of his hat, then they still retain their jobs and Shildt gets the interim tag pulled.
Mo at a minimum and possibly Girsch should have been shitcanned along with Matheny and his BFF. The timing of this just reeks of self-preservation.