IMO Murphy is pretty average, I actually preffered him out on the wing but at the same time currently he's probably our best option upfront alongside McGoldrick.
Thing is Murphy is decent enough in the air but despite his physique he's not the best target man, which we are using him as, he's actually not bad on the floor but doesn't win enough headers for me neither does he attack the ball in the box enough in the box for me. I think he's okay as the second striker, as a foil i.e like he was used with DJ but with McGoldrick he's expected to be the target man and the main striker as McGoldrick drops deep. Alan Lee is(was) far better at playing that role than Murphy.
In a battling team Lee was great, in fact I think we may have been relegated in Royles last season if it weren't for Lee, he was monumental for us but in Jims second season our play evolved a bit more and he didn't need to be that hustle and bustle player, he tried to become a more technical player and I think he lost his spark abit, so had no qualms at the time about us selling him, I felt it was the right step for us to progress, as we didn't really need a player like him anymore, with hindsight though perhaps selling him wasn't a good idea as we didn't really improve and I think a player like Lee would really suit this team and actually although PJs team was more technical and 'tippy tappy' I think he may well have suited playing upfront in the 451.