With the limited knowledge I have on this, if asked who out of Murtough or Arnold to keep, I'd go the latter all day long. Maybe some of that is because I've heard Arnold speak and found him warm and honest (in the pub chat with the protestors, which was admittedly small-time but humanised him, and also at the United awards show).
Besides some of the stupid stuff I see us doing from a footballing point of view, two other things stick in my mind about Murtough -
1) The conversation with Lingard, rejecting a loan but offering days off, seemingly without Ralf Rangnick's say-so
2) The fact that the media basically had to tell ETH that Luke Shaw signed a new contract. Why the feck isn't Murtough doing that?
He seems to be a poor communicator. For someone meant to be getting our footballing operations organised, he seems to be doing anything but that. Having said all this, it's really hard to assess while the Glazers are in charge. Maybe the likes of Murtough and the scouts etc. will thrive under new owners.
As for Fletcher, I don't get the crazy hate/suspicion over him here. He's clearly a very intelligent bloke (I've spoken to him so perhaps I'm biased) and lots of successful clubs employ ex players in more important roles than our Darren occupies.